An interim analysis of 94 individuals conducted by an independent data-monitoring committee found that the vaccine efficacy rate was above 90%, seven days after the second dose. However, the proteins produced by this product are sufficiently immunogenic to prime the host immune system to mount an effective immune response against the disease-causing pathogen. Speaking specifically for Sars-CoV-2, the mRNA vaccines encode a part of the spike protein found on the surface of the coronavirus. Pfizer’s two doses in three weeks is a good strategy because the second dose acts as a booster for generating a strong immune response. The mRNA vaccine needs to be stored at -70°C or below.

Source: Hindustan Times November 16, 2020 14:10 UTC