<div dir="ltr">I am sure that the CVCard and QR codes do make a difference and allow the contact tracers to contact some of the potential virus sources or recipients before they can spread the virus further, and because this should be a computer-based solution, this frees up those contact tracers to work on the rest of the potential contacts. I am also sure that if people don't practice social distancing and don't wear masks and don't scan the QR codes then even with CVCards the virus could explode exponentially. What I don't know is how much of a difference the CVCard would make, and one of the big questions would be to what extent the people who would carry a CVCard are the same people who would scan QR codes, wear masks, practice social distances, etc. I fear the overlap could be quite high, so the CVCard may do little to improve the overall situation as much of the population largely ignores Covid-19 and does what they want as far as they think they can get away with it.<div>I also fear people who do start carrying CVCards might stop scanning QR codes thinking that they no longer need to do so, but fortunately there is a solution - set up a different type of CVCard to place by the QR codes so the CVCards (both those carried and those at the business entrances) record those people's movements.</div><div>Cheers</div><div>Trevor</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Aug 29, 2020 at 7:07 PM Charles Manning <<a href="mailto:cdhmanning@gmail.com">cdhmanning@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Mike</div><div>I doubt there is any solid anything behind this. Too much feel-good based "do something, anything".</div><div><br></div><div>It would be interesting to know how many infected people the QR code thing has successfully tracked down. I hunch that number is extremely low.</div><div><br></div><div>I agree with your concerns re risk: Various areas of psychology would suggest that people modify their behaviour according to risk profiles and virtue signals.</div><div><br></div><div>For example there's that effect (its name escapes me now), where people feel the food they are eating is more healthy if the menu has salads on it - even though they're not eating the salads.</div><div><br></div><div>Similarly, those people are then more likely to treat themselves with desert for having been healthy eaters.</div><div><br></div><div>So will this happen with a potential CVCard? I'm carrying my card so I'm "doing my bit" and can then go do X which I would not do if I didn't have my card.</div><div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Aug 29, 2020 at 5:03 PM Mike Field <<a href="mailto:hamster@snap.net.nz" target="_blank">hamster@snap.net.nz</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">(this time to the list 8) )<br>
<br>
Is there any research that indicates that CovidCard, even with very high <br>
80%+ adoption rate, 90%+ of contacts logged and so on, backed up with <br>
"Gold Standard" contract tracing and isolation, is sufficient to to <br>
reduce effective R value less than 1.0? In other words, if the tech is <br>
good and it is successfully deployed will it cause the pandemic to die <br>
out, and allow restrictions to be lifted things like tourism and mass <br>
gathering to resume?<br>
<br>
My own feeling is that CovidCrd will not greatly reduce the overall <br>
risks, by adding weight to political discussions to drop restrictions, <br>
and enabling people to partake in high-risk behavior (cafe's, clubbing, <br>
dining out, church, travel, concerts...) because "technology has their <br>
back".<br>
<br>
Mike<br>
<br>
P.S. Why was this somewhat a patsy question? <br>
<a href="https://www.newsroom.co.nz/heres-what-we-need-in-a-digital-contact-tracing-solution" rel="noreferrer" target="_blank">https://www.newsroom.co.nz/heres-what-we-need-in-a-digital-contact-tracing-solution</a><br>
<br>
<br>
<br>
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