is another driving factor and calls for attention as in vacation
times, density of regions change thus exposing naive populations
who have had limited exposure to the virus.
This maybe limited when it happens in summer, with some
possible protection from sun and many open air activities. As 2
driving factors may mitigate each other.
is different if peoples pend increasing time
in closed places possibly aggravated by recycled air or
A/C where clusters may form.
Authorities and people should consider all alternatives
to confined mass transport which may favor this epidemic and
future ones beyond masks’ eventual relative protection.
and companies may want to consider improving air circulation with
renovated fresh air such buildings to protect their employees and
even gain productivity for this epidemic and possible future ones
SMIEZEK G LAZZARI M SALATHE show how improving air change rate in
buildings may « correspond
to a vaccination coverage of 60–70% for an efficacy of 40%, 50–60%
for 60% efficacy, and 40–50% for 80% efficacy. In the aerosol
model, consistently improved ventilation beats vaccination even
with full coverage if efficacies are low. »