Natural Immunity for the Win- 3 studies

Sunday, August 29, 2021

Here, we evaluate 254 COVID-19 patients longitudinally up to 8 months and find durable broad-based immune responses. SARS-CoV-2 spike binding and neutralizing antibodies [have] an extended half-life of >200 days suggesting the generation of longer-lived plasma cells… Taken together, these results suggest that broad and effective immunity may persist long-term in recovered COVID-19 patients.

Not one of the 1359 previously infected subjects who remained unvaccinated had a SARS-CoV-2 infection over the duration of the study. 

Israeli researchers looking at a much larger group of people also found very, very low reinfection rates. Only 19 out of 16,215 people with natural immunity had a second infection from June 1 to August 14 (far fewer than the number of vaccinated people who were infected in a matched group).