FREQUENTLY ASKED QUESTIONS

WH

ha (w Th ha re di

Ext

22 % eco ser to

U? IS A SERO SURVEY?

study of how many people tibodies against the Sars-cov-2 auses Covid-19) in their blood. cates that these people may en silently infected and d, giving a better picture of the spread

IS IT DONE?

collected is blood, which is what is known as IGG

These are a kind of antibody s around a week after oms set in and can be detected multiple weeks later on

ACCURATE IS IT?

Indian Journal of Medical e test – Covid Kavach kit Gujarat-based Zydus Cadila, has y of 97.9% and sensitivity of e numbers determine the a result being right, a y that also depends on how prevalent a disease is. When testing for a disease with low prevalence, tests without high specificity levels can generate significant false positive results

WHAT DOES THIS MEAN FOR THE BREAK?

this would mean that roughly hi’s population may have had it , putting the city that much herd immunity’ level. Herd n enough people recover n and are no longer suscept at the disease automatically dies out due to a lack of new hosts. According to experts, this can vary between 40-65% in case of Covid-19. The study relates to the spread seen between June 27 and July 10, and the current prevalence may have grown

OES IT MEAN FOR

e study, assuming it was randomised t extent possible, implies that four people may have had recovered. But, equally it also means that three ery four people are still vulnerable. For people in Delhi, this does not mean that they can stop taking precautionary measures such as social distancing and wearing masks

ARE E WHO MAY HAVE THE VIRUS NOW SAFE?

ow, people who recover are known to e es and immune responses at lea mporarily protect them. It ains to en how long this ctio . Immunity to some s are known to last a year