Alex Sigal Person-Info 

( Ich bin Alex Sigal)

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South Africa variant: Scientists fear the 'escape mutant' that may...

edition.cnn.com
Scientists have identified an

Omicron infection may increase immunity against Delta variant, study...

www.mercurynews.com
· ... according to the authors led by Alex Sigal and Khadija Khan of the Durban, South Africa-based Africa Health Research Institute.

Pfizer Vaccine Has 23% Efficacy Vs. Omicron Variant: Study | Time

time.com
A two-shot course of Pfizer’s vaccine has just 22.5% efficacy against symptomatic infection with the omicron variant, but can thwart severe disease, according...

Previous COVID-19 infection may offer less protection from new ...nypost.com › › previous-covid-19-infec...

nypost.com
· “We have reason to be concerned because the virus has found a way to escape from previous antibodies,” Alex Sigal, a virologist at the ...
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