Author Topic: Transmissibility of COVID-19--presymptomatic transmission is possible  (Read 32 times)

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Offline agate

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The novel coronavirus called COVID-19 can be transmitted by someone who has no symptoms yet  but is carrying it.  This is one reason why precautions like social distancing, face masks, and diligent handwashing are needed.


From the NEJM Journal Watch (April 15, 2020):


Quote
Timing of viral shedding & transmissibility:[/size] [/color]
[/size][/color]
[/size]Reporting in [/color][/size]Nature Medicine[/color][/size], researchers in China examined viral load data on some 90 COVID-19 patients, as well data on the timing of transmission among nearly 80 transmission pairs (that is, one person likely infected the other). Combining these data — and assuming an incubation period of 5.2 days — the researchers conclude that infectiousness began 2.3 days before symptom onset and peaked 0.7 days before symptoms began. They also estimate that presymptomatic transmission accounted for 44% of secondary cases among the transmission pairs.[/color]


https://www.nature.com/articles/s41591-020-0869-5
MS Speaks--online for 17 years

SPMS, diagnosed 1980. Avonex 2001-2004. Copaxone 2007-2010. Glatopa (glatiramer acetate 40mg 3 times/week) since 12/16/20.

 

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