1/ New retrospective cohort study from @ClevelandClinic in @IDSAInfo
Assessed #covid19 test positivity rates after 90 days in patients who tested positive previously— much less likely to have a positive result compared to those who tested negative previously.
Assessed #covid19 test positivity rates after 90 days in patients who tested positive previously— much less likely to have a positive result compared to those who tested negative previously.
2/ “Protection offered by prior infection was calculated as one minus the ratio of infection rate for positive patients divided by the infection rate for negative patients.”
#covid19
#covid19
3/ “Protection offered from prior infection was 81.8% (95% CI 76.6 to 85.8), and against symptomatic infection was 84.5% (95% CI 77.9 to 89.1). This protection increased over time.” #covid19
4/ “In this retrospective cohort, patients who initially tested positive for COVID-19 were less likely to be subsequently tested or test positive than those who initially tested negative during the same time period. Most reinfected patients were asymptomatic.”
5/ “In this study of patients in one health system, previous infection appears to offer high levels of protection against symptomatic infection, as well as severe disease, for at least 8 months.” #covid19
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