Immunity acquired through natural infection confers protection that is at least as effective as vaccination [1]. However, the delta variant and other VOCs have

Immunity acquired through natural infection confers protection that is at least as effective as vaccination [1]. However, the delta variant and other VOCs have mutations that will reduce this protection in both vaccinated and naturally immune individuals. > A previous history of SARS-CoV-2 infection was associated with an 84% lower risk of infection, with median protective effect observed 7 months following primary infection. This time period is the minimum probable effect because seroconversions were not included. This study shows that previous infection with SARS-CoV-2 induces effective immunity to future infections in most individuals. [1] [1] SARS-CoV-2 infection rates of antibody-positive compared with antibody-negative health-care workers in England: a large, multicentre, prospective cohort study (SIREN) https://pubmed.ncbi.nlm.nih.gov/33844963/ https://pubmed.ncbi.nlm.nih.gov/33844963/