What COVID-19 Seroprevalence Surveys Can Inform Us
Learn Textual content Equal (for Part 508 entry)
Antibody towards SARS-CoV-2
Serology, or antibody, testing checks a pattern of an individual’s blood to search for antibodies towards SARS-CoV-2, the virus that causes COVID-19. Antibodies normally turn out to be detectable within the blood 1-3 weeks after somebody is contaminated.
Individual contaminated → 1-3 weeks → individual has detectable stage of antibodies*
*Some individuals could take longer than 3 weeks to develop antibodies, and a few individuals could not develop antibodies. It’s presently unknown how lengthy antibodies are detectable after an infection.
A optimistic outcome from this take a look at could imply that an individual was beforehand contaminated with the virus.
Constructive (pattern optimistic for SARS-CoV-2 antibodies)
Damaging (Pattern damaging for SARS-CoV-2 antibodies)
The proportion of people in a inhabitants who’ve antibodies to an infectious agent is named seroprevalence.
A seroprevalence survey makes use of antibody exams to estimate the share of individuals in a inhabitants who’ve antibodies towards SARS-CoV-2.
This may inform us how many individuals in a particular inhabitants could have been beforehand contaminated with SARS-CoV-2.
A small pattern of individuals taking part within the survey represents a bigger inhabitants, which could possibly be a neighborhood, state, or particular inhabitants (like healthcare staff or pregnant individuals).