natural infection – Covid-19 Notes

[Preprint] Comparing SARS-CoV-2 natural immunity to vaccine-induced immunity: reinfections versus breakthrough infections

SARS-CoV-2-naïve vaccines had a 13.06-fold (95% CI, 8.08 to 21.11) increased risk for breakthrough infection with the Delta variant compared to those previously infected, when the first event (infection or vaccination) occurred during January and February of 2021.

Comparing SARS-CoV-2 natural immunity to vaccine-induced immunity: reinfections versus breakthrough infections

Background Reports of waning vaccine-induced immunity against COVID-19 have begun to surface. With that, the comparable long-term protection conferred by previous infection with SARS-CoV-2 remains unclear. Methods We conducted a retrospective observational study comparing three groups: (1)SARS-CoV-…

Harvard Epidemiologist Says the Case for COVID Vaccine Passports Was Just Demolished

…vaccinated individuals were 27 times more likely to get a symptomatic COVID infection than those with natural immunity from COVID.

Harvard Epidemiologist Says the Case for COVID Vaccine Passports Was Just Demolished

A new study on Israel’s COVID outbreak found that vaccinated individuals had 27 times higher risk of symptomatic COVID infection than those with natural immunity from prior COVID infection.