Hi Everyone,

Seth suggested a 2-day cooling off period before any new posts on this topic. A 
good idea. I am traveling in Australia right now, and between the 200 different 
time zones, the switch to standard time from daylight savings time, and the 
international date line, it's taken me about 2 days to figure out the 2-day 
lag. In any case, hoping enough time has passed, I'd like to add some thoughts 
about this issue that may be helpful for those who have the difficult 
responsibilities of trying to make decisions about their dances.

If we are considering ending or changing the covid rules for our dances, there 
are some basic things that can underlie our decisions:

* Covid is a respiratory disease. It invades the body through mucous membranes 
in the mouth, nose, and sometimes the eyes.
* The virus spreads primarily through droplets and aerosols expelled through 
the mouth and nose. But virus particles can be easily diluted and dispersed by 
wind, including good air movement.
* Contra dancing is an activity where people breathe on each other, interacting 
with many people in a short period of time, over and over again. Sometimes 
breathing hard. Nearly always indoors.
* CDC guidelines are not based on contra dancing. Even in medical facilities, 
patients, doctors, and nurses do not swing each other, breathe into each 
others' faces, and change partners every 35 seconds (at least I hope not). 
Guidelines for medical facilities are not directly relevant to contra dances.
* The current variants of this coronavirus are much more transmissible than the 
earlier variants. Meaning that data from the pre-delta/pre-omicron period may 
be misleading and not properly relevant to today's circumstances.
* Vaccinated people can indeed get infected and sick with covid, but in general 
their transmissible phase (when they can infect others) is a day or so shorter 
and usually contains lower levels of the virus, compared to unvaccinated people.
* The current covid statistics from the CDC and other agencies have some 
serious problems. While the reported rates of deaths and hospitalizations are 
probably accurate, the reported rates of infection (derived from testing) are 
systematically biased low because so many people now test at home without 
officially reporting the results.

So, after three years of not dancing together and/or complying with covid 
restrictions of requiring vaccinations, wearing masks, etc -- well, here are my 
thoughts --

* Masks are still critical in contra dances. The general infection rate is 
higher than officially reported. Especially important for people vulnerable to 
being infected. (This is in the U.S. Other countries with higher vaccination 
rates may have much lower infection rates.). The protection with masks goes 
both ways.

* Vaccinations -- not so much, especially if people wear good masks (N95 or 
equivalent) and the mask requirement is enforced. Also, people who have been 
sick recently with covid are well-protected from having a transmissible virus 
load. (The operative word here is "recently". But the practical question is the 
definition of "recently".)

* Air movement in the room -- this item has not been emphasized enough, 
although it's extremely important. And it's something that dance groups can 
directly improve at their dances. Open windows, multiple fans, etc. Also, dance 
organizers can easily monitor air movement with a carbon dioxide sensor 
(portable sensors are available for less than $100). Place one in a room and 
see what happens during the dance evening. CO2 is heavier than air. People 
breathe out CO2. Therefore, CO2 levels in a room can be a proxy for the risk of 
covid transmission because CO2 levels reflect the amount of air movement. 
Atmospheric CO2 levels are around 413 ppm. If the air doesn't move much, CO2 
levels will quickly rise during a dance evening, sometimes to more than 1,000 
ppm. If the CO2 level can be maintained below 600 ppm, this probably indicates 
that air is circulating relatively efficiently, which reduces the risk of viral 
particle buildup. Keeping the CO2 level near 413 ppm is even better. (It's a 
well-known fact, for example, that exhaled coronaviruses are not very 
transmissible in a 40-mph prevailing wind.)

* Mandatory reporting - need to know if any dancers experience covid symptoms 
or test positive soon after a dance event. Collecting this information is 
awkward and cumbersome, probably pie-in-the-sky, but it would be a good 
statistic. And provide assurance to everyone, especially over time.

Long and complex, but just my two cents.
Woody

Woody Lane
Caller, Percussive Dancer, Event Organizer
Roseburg, OR
_______________________________________________

-----Original Message-----
From: Lisa Sieverts via Organizers <organizers@lists.sharedweight.net>
Sent: Friday, April 7, 2023 11:34 PM
To: A list for dance organizers <organiz...@sharedweight.net>
Subject: [Organizers] Is it time to change our mask mandates?

Hello fellow organizers,

I have been a big proponent of our dance mask mandates and feel we have 
prevented quite a bit of COVID spread by requiring good facemasks.

However, our local hospital has announced that after 3 years of a mask mandate 
for everyone entering their building (it's both a hospital and a medical 
center), they are lifting the mandate on April 10 for anyone asymptomatic and 
who hasn't had a recent COVID contact.

Our board will be discussing this soon but I am very curious about what other 
organizers think. Is it time? And what should be our criteria for lifting our 
mandates?

Best,
Lisa
Monadnock Folklore Society
Nelson, NH

Lisa Sieverts
603-762-0235
l...@lisasieverts.com
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