, the US population on Dec 29 was, rounded, 334 million. 
"Cases" must include repeats.
Mac Sloan
On 23/01/04 8:49 PM, Jeff Kaufman via Organizers wrote:
  "we've now crossed 100M cumulative cases in
the US"
 
 More like 400M: the CDC estimates that there were ~4x as many cases as 
 reported cases: 
 
https://www.cdc.gov/coronavirus/2019-ncov/cases-updates/burden.html 
 <https://www.cdc.gov/coronavirus/2019-ncov/cases-updates/burden.html>
 
 Jeff
 
 On Wed, Jan 4, 2023 at 6:26 PM Lex Spoon via Organizers 
 <organizers(a)lists.sharedweight.net 
 <mailto:organizers@lists.sharedweight.net>> wrote:
 
     It's a difficult subject but is important for all our dances. It's
     heartening to see such a positive discussion of such an important
     subject. If people can't talk about it here, then where, and if they
     can't talk about it anywhere, then does everyone just have to be
     dumb and to reinvent the wheel alone? I appreciate everyone's
     courtesy and hope my message comes through the same way.
 
     I agree, as far as they go, on the 11 high-level points in the
     opening message, and also on the pragmatic approach of polling and
     surveying your own, actual dancers. Contra dancers tend to be
     special compared to the general public, and indeed that's some of
     the appeal, for all us strange birds to find each other. Also,
     thanks tremendously for the posted survey results, though I'd
     underscore the issue of response level with surveys. The
     non-responders may well be those who don't have a strong opinion and
     who will simply comply with whatever the policy is.
 
     The post about running an experiment on different policies resonated
     with me.  The Atlanta organizers did something similar when they
     started opening up as well. The great thing about having an
     experiment--e.g. different lines, or different policies on different
     nights--is that you can see what people do with their feet, as
     opposed to what they say in a survey.
 
     Here are a few aspects I don't yet see mentioned.
 
     So far the thread is about entry conditions, but an additional part
     of a Covid policy is about how people treat each other. Similar to
     policies about respectful treatment of each other, it's valuable to
     encourage dancers to make no assumptions about each other's mask
     status. As a personal note to show why this can be so important,
     someone close to me was reluctant to wear masks for years, well
     before Covid-19, because people would treat you so funny if they saw
     a mask on you. Organizers can enforce this kind of thing by first of
     all saying it's the policy, loudly and in front of the whole dance
     hall; and also, they can show the door to anyone that just has to
     make an issue out of everything and is making the others
     uncomfortable. This kind of policy makes a dance very attractive as
     a safe space during something that's a difficult time for all of us.
 
     The thread on dances as spreaders raised an important question, but
     alas not very convincing for me. As I quietly predicted, a bunch of
     people posted about how they aren't aware of their dance being a
     spreader. What did we learn, though? Contact tracing is hard at the
     best of times, and I'm not sure people on that thread have done
     careful evidence gathering such as randomized testing before and
     after the dance. Our best information is therefore the general
     research literature, even though it's not specific to contra dance.
     The literature is dense, messy, and generally not as conclusive as
     would be convenient for any of us. In general, though, all group
     events are spreaders, and it would be a scientific miracle if even
     the strictest contra dances aren't a source of transmission to some
     level.
 
     As people think about their own dance, bear in mind that different
     dances have different conditions. National events with attendees
     from all over are the worst spreaders and deserve the strictest
     policies (to the extent they open their doors at all). At the other
     end of the spectrum, dances with fewer attendees are less likely to
     be spreaders.  Dances with *local* attendees, especially by people
     who already socialize with each other outside the dance, are also
     less likely to be spreaders. Ventilation matters, with outside
     dances being the least likely to spread Covid. Age matters as well;
     younger dancers will have reduced symptoms and health risk.
 
     It has happened by inches, but nowadays the U.S. population is
     mostly immunized. According to the CDC, we're up to 80% who have had
     at least one vaccine dose, and 69% who have received a complete
     primary series. In addition to the vaccine, we've now crossed 100M
     cumulative cases in the US. Between those two factors, most dancers
     at an event will be immunized even with no overt policy at all.
 
     Covid treatment is better than it used to be. I'm out of my depth
     except to say that if you ask a health practitioner, you get an
     incredibly different picture of the hospitals nowadays compared to
     even a year ago.
 
     Finally, it's not a yes/no policy question but has some options. You
     can make masking optional but still require vaccination, etc.
 
     Good luck everyone, and happy dancing this year, in whatever form it
     may take.
 
     Lex Spoon
 
 
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