that showed antibodies waning after 20 days, but the authors suggest that variations in immunoassay test characteristics and manufacturing may be responsible for the difference.
"These results are important because they show, definitively, that patients infected with the COVID-19 virus do in fact retain immunity against the virus and the disease," said senior author Menno van Zelm, PhD, in a Monash University news release yesterday.
"This has been a black cloud hanging over the potential protection that could be provided by any COVID-19 vaccine and gives real hope that, once a vaccine or vaccines are developed, they will provide long-term protection."
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