Do Kovid vaccines prevent you from spreading the virus, or do they protect you from getting sick?
Scientists are not yet aware – and uncertainty has major implications during the vaccine rollout.
Pfizer and Modern, companies that have yet to develop authorized vaccines in the US, say their vaccines are about 95% effective, preventing people from getting sick with Kovid’s symptoms. But there is not yet enough evidence on whether vaccines also prevent asymptomatic infection and transmission.
Companies say research is ongoing to determine the answer. Without vaccines, research has suggested that asymptomatic transmission of coronovirus that causes covariates is responsible for about a quarter of infections.
Experts say that precautions such as wearing masks, avoiding social disturbances and crowded spaces will be necessary until the country gets closer to herd immunity, at which point enough people are immune to a disease, Its spread is not possible. Some studies have estimated that approximately 75% to 80% of the US population needs to be immunized to Kovid-19 to reach herd resistance, but this number is a dynamic target and could emerge as a new form. is.