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          • Term
            • SAR or 2AR (secondary attack rate)
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          • Definition(s)
            • The probability that infection occurs among susceptible persons within a reasonable incubation period following known contact with an infectious person or an infectious source. It is a key epidemiologic parameter in infectious diseases that are transmitted by contact. Wiley Online Library
          • Example sentence(s)
            • The secondary attack rate (SAR), defined as the probability that an infection occurs among susceptible people within a specific group (ie, household or close contacts), can provide an indication of how social interactions relate to transmission risk. - The Lancet by
            • The secondary attack rate for SARS-CoV-2 — the virus causing coronavirus disease (COVID-19) — is under 1% among close contacts of U.S. patients, according to findings in MMWR. - NEJM Journal Watch by
            • The estimated secondary attack rate was 685 per 100 000 among household contacts, 404 per 100 000 among day-care nursery contacts and 77 per 100 000 among pre-elementary school contacts. - Science Direct by
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