Public attitudes towards COVID‐19 contact tracing apps: A UK‐based focus group study

Abstract Background During the 2020 COVID‐19 pandemic, one of the key components of many countries’ strategies to reduce the spread of the virus is contact tracing. Objective To explore public attitudes to a COVID‐19 contact tracing app in the United Kingdom. Setting Online video‐conferencing. Participants 27 participants, UK residents aged 18 years and older. Methods Qualitative study consisting of six focus groups carried out between 1st‐12th May, 2020 (39‐50 days into the UK ‘lockdown’). Results Participants were divided as to whether or not they felt they would use the app. Analysis revealed five themes: (1) lack of information and misconceptions surrounding COVID‐19 contact tracing apps; (2) concerns over privacy; (3) concerns over stigma; (4)concerns over uptake; and (5) contact tracing as the ‘greater good’. Concerns over privacy, uptake and stigma were particularly significant amongst those stated they will not be using the app, and the view that the app is for the ‘greater good’ was particularly significant amongst those who stated they will be using the app. One of the most common misconceptions about the app was that it could allow users to specifically identify and map COVID‐19 cases amongst their contacts and in their vicinity. Conclusions Our participants were torn over whether digital contact tracing is a good idea or not, and views were heavily influenced by moral reasoning. Patient or Public Contribution No patients were involved in this study. The public were not involved in the development of the research questions, research design or outcome measures. A pilot focus group with participants not included in the present paper was used to help test and refine the focus group questions. Summary results were disseminated via email to participants prior to publication for feedback and comment.


| BACKG ROU N D
As of September 16, 2020, COVID-19 accounted for approximately one million deaths globally, approximately 40,000 of which were in the UK, with total numbers of cases and deaths increasing daily. 1 The novelty of the SARS-CoV-2 virus means that, at present, no vaccines or antiviral drugs are available. In the absence of biomedical interventions to reduce morbidity and mortality from COVID-19, non-pharmaceutical interventions, such as physical distancing, hand hygiene and restricted movement, have been proposed, including the 'lockdown' policy of only leaving the home when essential (implemented in the UK on March 23, 2020). 2 Although highly effective as a means to significantly slow the transmission of the virus (that is, to lower its reproductive (R0) value) in the population, lockdown is a strict strategy that is having number of significant adverse impacts, including wider economic impacts for society and social and psychological impacts for individuals. 3,4 As such, stringent lockdowns are necessarily a temporary and relatively short-term measure.
One of the key components of many countries' post-lockdown strategies is the use of contact tracing. Contact tracing is where those in close contact with individuals, who report symptoms indicative of an infectious disease and/or test positive for the disease, are identified and given appropriate medical instruction. It has successfully been used to control the spread of other novel communicable diseases, such as Ebola. 5 Traditionally, contact tracing relies on a team of health workers to track possible transmissions manually, through interviews with those who test positive for an infectious disease, in order to work out with whom they have recently been in close contact. Contacts deemed at risk are then informed of the fact they have been exposed and are then advised (or in some countries required) to self-isolate. Several countries, most notably South Korea and Singapore, have successfully used contact tracing (primarily using manual tracing) methods at an early stage in the outbreak in order to dramatically slow the spread of, and reduce the total number of cases and deaths from, COVID-19. 6 However, while manual contact tracing has proven successful at early stages in the outbreak, where total number of cases are very low, it has been argued that doing so at a later stage, when total numbers of infections are much higher, is problematic. 7 Firstly, manual contact tracing on a large scale is highly resource-intensive. For instance, in the UK an initial 18-25 000 contact tracers were employed during May 2020. 8 Secondly, it has been argued that due to the speed at which COVID-19 spreads, manual contact tracing might be too slow to be effective on its own. 9 As such, digital contact tracing has been proposed and is being explored in a number of countries, including the UK, as a supplement to manual contact tracing. 10 The UK's path to providing a contact tracing app has been controversial and subject to much discussion and critique in the UK media. 11 Essentially, contact tracing apps work by keeping a record of other smartphones they have been in close proximity with, via the phones' built-in Bluetooth signals that are anonymously swapped via a 'digital handshake'. Initially, the UK government proposed a 'centralized model', where contact data are stored in a cental database and not exclusively on the phones themselves. On 12th April, the UK government announced the new centralized NHSX (the technology arm of the UK's National health Service) contact tracing app, a pilot trial of which was launched on the Isle of Wight (a small island with a population of approximately 140 000) on 4th May. 12 The centralized approach contrasted with the version developed by the major technology companies Apple and Google (a 'decentralized approach'), where contact information is only stored on the phones' handsets, a model being used in a number of other countries like Germany and Switzerland. 12 On the 18th June, the UK government abandoned its app, in favour of the decentralized model, after releasing details of a number of problems identified in the pilot, including the fact that when used on Apple iPhones, only around 4% of contacts were successfully identified. 13 The new, decentralized app was later officially released on September 24, 2020. As discussed below, focus groups for this study were conducted between 1st-12th May 2020, prior to the app's eventual release, and at a time when the UK was proposing its NHSX centralized app would be used.
Modelling evidence suggests that in order for digital contact tracing to be effective, use of contact tracing apps would need to be very high, with 80% of smartphone users (equivalent to 56% of the UK population) needing to use the app in order to completely stop the pandemic spreading, although lower rates of use could still have beneficial impacts. 9 Although much has been written about contact tracing apps in the media, academic research is only just beginning to explore public attitudes towards COVID-19 policy, including contact tracing strategies and technologies, and much of it so far has taken the form of public opinion surveys. 14,15 Some surveys have suggested that a majority of smartphone users would use the app, 16 but emerging evidence from early-adopting countries like Singapore suggests that actual uptake might be considerably lower. 17 There is, to our knowledge, as yet no published qualitative research on public attitudes towards COVID-19 contact tracing apps. Qualitative research can provide an important supplement to large sample opinion polls involving an in-depth exploration of the reasons and motivations behind individuals' intentions towards use of contact tracing apps. If the UK's contact tracing strategy is to be effective, government and health authorities will need to understand and respond quickly to any public concerns over the app. The aim of this paper is to explore attitudes towards digital contact tracing in a sample of the UK public. Specifically, we seek to explore people's knowledge of digital contact tracing, their views on contact tracing apps (specifically the extent to which they are favourable to them or not), and ultimately whether or not they planned to use a contact tracing app when one became available in the UK. These findings can feed into K E Y W O R D S contact tracing, COVID-19, public attitudes, public health debates around how best to communicate to the public the potential role of digital contact tracing as a contributing intervention through which to reduce the future spread of COVID-19.

| ME THODS
We conducted six online focus groups with 27UK-based participants between 1st and 12th May 2020 during the UK's COVID-19 lockdown (39-50 days after the official start of the UK lockdown).For context, as described above, at the time of data collection, the UK government had proposed a centralized approach using a NHSXdeveloped app, due to be trialled from 4th May 2020. Participants were adults aged 18 years or over currently residing in the UK. All focus groups were conducted using the online conference platform Zoom. Online focus groups do have methodological benefits particularly as a cost-effective method of eliciting public views from a geographically dispersed group of participants. 18,19 Focus groups were conducted as part of a larger, mixed-methods longitudinal study tracking public attitudes to COVID-19 and its as- Focus group recruitment took place online through a combination of social media snowball sampling, online community and volunteer advertising sites and social media advertisements. For example, advertisements were placed in local community groups on social media (eg Facebook) and other community advertising sites (eg Gumtree), but did not target specific interest groups or inclusion criteria, other than focusing on local or regional interests. We did however take a purposive approach to sampling, attempting to include a range of ages, genders, racial/ethnic identities and occupational backgrounds (Table 1).
Most participants were recruited from social media snowball sampling and online community and volunteer advertising sites, which likely accounts for the high number of participants in the 18-49 age range and the lack of participants aged 50 and over (due to the fact the sites are more commonly used amongst younger age groups). Although participants were aware all research was online, adverts were placed in relevant community groups on social media and volunteering sites in a variety of countries, regions and cities across the UK, so as to recruit participants from across the UK The final sample included participants from all four UK countries (in order to protect confidentiality specific locations of participants are not provided). Paid-for social media (Facebook) advertisements were taken out to specifically target potential participant aged 50 and over, but these failed to generate any sustained interest from potential participants.

| Analysis
Data were analysed in accordance with a thematic approach 20,21 This is an iterative and abductive analytical process through which emergent themes from early focus groups were used to add to or refine questions and prompts during subsequent groups. Data were transcribed for coding, with all participant information being anonymized to protect confidentiality. SW and KD analysed the transcripts and developed and applied the thematic coding framework, moving from open through to more focused coding. 20,21 Themes were discussed and developed with CA and TT during virtual research group meetings. Negative case analysis was used to seek for information that did not fit emergent themes, and where this occurred, themes were modified accordingly. 22 Data collection and analysis continued until theoretical saturation was reached. 21 Data were analysed in NVivo (version 11.4.3, QRS).
Ethical restrictions related to participant confidentiality prohibit the authors from making the data set publicly available. During the consent process, participants were explicitly guaranteed that the data would only be seen my members of the study team. For any discussions about the data set please contact the corresponding author (s.n.williams@swansea.ac.uk).

| RE SULTS
Participants were split regarding whether or not they felt they would use a contact tracing app. While some stated they would be using and was particularly significant for those in the 'would use' group.

| Concerns over privacy
The most commonly stated concern was over data privacy and security. Participants expressed a reluctance to have their data accessed by government or health authorities. Participants associated con- For those who stated they will not use the app, privacy was the most common reason stated for their decision. They were generally opposed to anyone, including government and health officials accessing their data under any circumstance. For those who said they would download the app, privacy concerns were mentioned, but were seen to be outweighed by the perceived benefits of the app for public health (as discussed below). Those who were undecided tended to argue that they would use the app provided they were sure that their data were not visible to other smartphone users or the general public they were given assurances over privacy and data

| Concerns over stigma
Another commonly expressed concern was over the stigmatizing potential of the app. This concern was related to concerns over a lack of privacy and specifically the misconception that the app would en-

| Concerns over uptake
Another commonly voiced concern was over uptake of the app.  Concerns over uptake were framed in terms of social inequalities and cultural norms around state interventionism. It was argued that because certain social groups do not have access to smartphones, and because the UK public would not be willing to accept contact tracing in general as a strategy, it would not be as effective as it had been in countries like Singapore or South Korea. Participants suggested that social 'pressure' might lead them to use the app, suggesting that uptake is tied to social norms around the potential popularity and thus effectiveness of the app. In turn, social norms over the popularity and eventual uptake of the app are interrelated with additional concerns over privacy and stigma, as well as to perceptions of social obligation ('civic duty').Concerns over privacy were often framed in terms of a general lack of trust or faith in government and its handling of the pandemic thus far, and their opposition to what was perceived as an unnecessary form of government control and the role of technology in the rise of a surveillance society. [23][24][25] A major theme was the perceived lack of knowledge and the existence of misconceptions around the app. One of the common misconceptions was that the app would provide identifiable information, and users themselves would be able to specifically identify others with COVID-19 (or be identified themselves). These concerns were expressed by participants across all three groups, but, as discussed below, were more salient in some groups over others, in relation to influencing their view on whether they will likely use the app or not. Concerns over stigma stemmed from a fundamental misconception that the app could enable its users to identify COVID-19 cases amongst their contacts or even synchronously map cases near them. It is worth noting that, despite these misconceptions, such findings imply that COVID-19 may be, for some, becoming a stigmatized disease. Future research will explore the potential stigmatization of COVID-19 sufferers in more depth and over time. The main implication of relevance to the present study is that the public may not be adequately informed as to what contact tracing apps entail. Improved communication regarding the purpose and nature of contact tracing apps may lead to increased use of the app.

| D ISCUSS I ON
Decision making was heavily influenced by moral reasoning.
Those who said they would not download the app were motivated primarily by their moral opposition to the use of such technologies as an infringement of individual civil liberties. This can be seen as an example of the liberal objection to public health intervention, 26 as seen previously in debates over smoking bans, 27 electronic cigarettes 28 and sugar taxes. 29 By contrast, amongst those who were intending on using the app, decision making was driven by a more utilitarian evaluation of the relative costs and benefits. 30 Many shared the same concerns as those who did not intend to use the app, but deemed that the potential life lost from COVID-19 outweighed any privacy infringements. In a sense, their construction of the app as being for 'the greater good' serves as rejoinder, based on Mill's harm principle, 31 to the liberal objection that using the app is a personal choice (since by not using it, one can, indirectly harm others by contributing to the spread of the virus).In some cases, reluctant willingness to use the app was framed in altruistic terms, as a personal sacrifice of one's privacy, whereas in other cases it was framed more in terms of enlightened egoism, 32 that is, as a means of protecting the vulnerable while also getting themselves 'out of this' pandemic. For those who stated they would use the app, the decision was arguably one high in 'moral intensity', because of the temporal immediacy of the pandemic (its rapid spread), the magnitude of its consequences (its high death rates) and its concentration of effect (ie severe impacts (serious illness and death) amongst a relatively small number of people being greater than modest impacts (privacy risks) amongst a much larger number of people (total app users)). 33 Finally, those who were undecided were generally still in the process of a utilitarian evaluation of the perceived costs and benefits of the contact tracing app. In order to achieve initial and ongoing use of contact tracing apps that are high enough to be effective, 9 it will be important to obtain the support of those who are as yet undecided as to whether such apps are an effective and ethical public health intervention.
It is worth mentioning that a novelty of the methodology of this study is the fact that online focus groups were rendered necessary due to the fact that in-person focus groups were not permitted as a result of the UK social distancing policy. As such, this provides an early example of the potential feasibility of conducting qualitative research during a pandemic. It is likely that currently, and for at least the immediate future, much qualitative research will need to be conducted via platforms such as Zoom. Future publications, building on our longitudinal design, will explore in greater depth the implications of virtual data collection during the pandemic, but a couple of early reflections warrant discussion here. Firstly, participant recruitment might have been impacted by the fact that far more social interaction was occurring online due to the pandemic. For instance, some potential participants might have been deterred from participating because they were already engaging in numerous videoconferences and were reluctant to add more to their schedules (a number of participants in our study mentioned feeling as though they were spending excessive time online (and suffering from so-called 'Zoom fatigue'). Secondly, although online focus groups were used in this particular study as a means for data collection, discussions revealed how for some participants, particularly those who lived alone, the focus groups themselves served as a source of social contact at a time when many in society were feeling isolated. 4 Participants reflections of the experience of taking part in the focus groups themselves will be discussed in more detail in future publications.

| Limitations
A limitation of this study is its sample size, which is small in relation to large quantitative surveys, 16 34 Additionally, the study did not include any individuals aged 70 or older (also considered 'clinically vulnerable', although this was because we did not receive any responses from this age group, despite noting in our recruitment material that applications from those considered clinically vulnerable were particularly encouraged. It is worth noting that using the term 'vulnerable' in our recruitment material may have dissuaded some participants from responding to our recruitment material, since, as has been argued, the term may be considered in some cases as derogatory or stigmatizing. 35 Future research will look to specifically explore the attitudes of those classed as clinically extremely vulnerable(eg with specific health conditions) and clinically vulnerable (eg over 70 years old) on COVID-19-related policy.

| CON CLUS IONS
Overall, findings suggest that many people are torn over whether digital contact tracing is a good idea or not, and concerns, particularly over privacy and effectiveness play a significant role in their decision making. Several of our participants may have been insufficiently informed about the specific details of what digital contact tracing entails. Interestingly, our findings suggest that some people may be actively avoiding news coverage on coronavirus (as a result of over-exposure to COVID-19 coverage and/or as a coping or avoidance strategy). Indeed, limiting watching news coverage on COVID-19 has been recommended as a means to protect mental health during the pandemic. 36 As such, authorities must explore a range of methods and media to communicate the purpose and nature of contact tracing apps, including but not limited to, social media ads, postal information, text messaging and other emergency alert systems.
Public health authorities need to explore ways to better communicate or emphasize that the app cannot enable the user to identify which of their contacts has reported COVID-19 symptoms or tested positive, and that confidentiality is protected (since, at time of data collection this was not clear to most participants).Due to the longitudinal nature of the research, future papers will explore participants' actual use or non-use of the app. In order to for uptake to be high, normative beliefs will need to reflect the potential effectiveness and popularity of the app. In this way, public health messages could be similar to those employed in the effort to encourage widespread adherence to social distancing guidelines, including campaigns around collective responsibility and the 'greater good'. In engaging with the public, government and health agencies should also take into con-

DATA AVA I L A B I L I T Y S TAT E M E N T
Data are available upon reasonable request. Ethical restrictions related to participant confidentiality prohibit the authors from making the data set publicly available. During the consent process, participants were explicitly guaranteed that the data would only be seen by members of the study team. For any discussions about the data set, please contact the corresponding author: SNW (s.n.williams@ swansea.ac.uk).