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originally posted by: xuenchen
a reply to: Fallingdown
Even without the masks ? 😷
Source for Study: pubmed.ncbi.nlm.nih.gov...
Conclusion: In summary, all the 455 contacts were excluded from SARS-CoV-2 infection, and we conclude that the infectivity of some asymptomatic SARS-CoV-2 carriers might be weak.
None of the 455 contracted Covid-19.
It is noteworthy that all personnel working in ED must take medical protection – namely, using N95 mask, putting on isolation gown and wearing goggle.
The statistics of 35 patients are displayed in Table 2. All patients also wore masks except for eating or drinking and were admitted to infectious department for medical isolation.
In total, 196 family members were enrolled. The situation on wearing masks was the same as that in patients.
The limitation of our study is that there is only one case and lack of detailed information on family members quarantined locally.
originally posted by: Phage
a reply to: RadioRobert
In tiny aerosols unlikely to be filtered by surgical- or cloth masks. As opposed to people with sputum which tends toward larger droplets...
My favorite mask (of three) consists of three layers of tightly woven cotton with a removable insert (I use a triple folded paper towel). I don't think it stops everything, but something is better than nothing. It does "puff out" when I breathe, that indicates that air molecules do not flow through it unimpeded and how small are they? And, I do occasionally cough and clear my throat normally.
No skin off my nose to use it, so to speak.
The study, published Aug. 4 in the journal Science, found that immune cells known as T cells that recognize common cold coronaviruses also recognize specific sites on SARS-CoV-2 — including parts of the infamous "spike" protein it uses to bind to and invade human cells.
But the infection numbers seem to indicate that it may not be as effective as hoped, if at all.
You're looking at 12 months. It's been six months of COVID so far.
Natural Immunity is likely one reason why fewer Americans contracted Covid-19 than the H1N1 virus.
From April 12, 2009 to April 10, 2010, CDC estimated there were 60.8 million cases