Thread by @ProfCharlesHaas

Partial good news out of @CDCgov today. cdc.gov/coronavirus/20…
Recognition that fomites are a minor route, and stop the #hygienetheatre . Also good, and pathbreaking that they cite #QMRA studies in support. 1/N

Interesting that they use a 1/10,000 from a surface contact as being indicative of low risk from fomites (many of us have seen that number before). But, still some problems in this updated science brief. 2/N

Opening sentence: "The principal mode by which people are infected with SARS-CoV-2 (the virus that causes COVID-19) is through exposure to respiratory droplets carrying infectious virus." While they don't use the word #aerosol in the body 3/N

of the text, this sentence does IMHO give de facto recognition of the inhalation route that many have been concerned with: "When a person with suspected or confirmed COVID-19 has been indoors, virus can remain suspended in the air for minutes to hours." 4/N

and #ventilation is at least mentioned "During the first 24 hours, the risk can be reduced by increasing ventilation". So I am starting to think that CDC is on the road to Damascus, but has some distance yet to get there. Curious to see what my tweeps may think. end/N