TeDaDeS
Hardcore Member
Immunity is this case is the way to express the amount of resistance to getting sick, which is a spectrum instead of binary. When optimal you indeed don't get sick. Immunity to Covid will wane over time, hence the booster programs, which happens the same for natural required immunity.How can you be more protected against something than when you are immune to it? Does natural immunity confer a healing effect when hit by the virus?
The conclusion from the research itself: "SARS-CoV-2-naive vaccinees had a 13.06-fold (95% confidence interval [CI], 8.08–21.11) increased risk for breakthrough infection with the Delta variant compared to unvaccinated-previously-infected individuals, when the first event (infection or vaccination) occurred during January and February of 2021. The increased risk was significant for symptomatic disease as well. When allowing the infection to occur at any time between March 2020 and February 2021, evidence of waning naturally acquired immunity was demonstrated, although SARS-CoV-2 naive vaccinees still had a 5.96-fold (95% CI: 4.85–7.33) increased risk for breakthrough infection and a 7.13-fold (95% CI: 5.51–9.21) increased risk for symptomatic disease."