Status: 29.03.2021 6:29 p.m.
According to a US study, the mRNA vaccines reduce the risk of corona infection by 90 percent – even those without any symptoms. This raises the hope of preventing undetected infections and thus breaking the chains of infection.
A new study from the USA confirms that certain corona vaccines are also highly effective against infections without symptoms. “The results showed that after the second dose of vaccine, the risk of infection was reduced by 90 percent two or more weeks after vaccination,” said the CDC.
Previous studies confirmed
Infections without symptoms were also recorded, which made up a small proportion of around ten percent of all positive tests. It is hoped that vaccinated people will in most cases no longer be able to infect others and that chains of infection can thus be broken.
The CDC had taken a close look at the mRNA vaccines from Pfizer / BioNTech and Moderna: Almost 4,000 people in the medical field were tested weekly in six US states between December and March. The results confirmed previous studies, which also indicate that asymptomatic transmission of the coronavirus in vaccinated people is rather unlikely. For example, there was a large-scale study from Israel that came to the conclusion that the BioNTech / Pfizer vaccine prevented the transmission of Sars-Cov-2 by 89.4 percent, including asymptomatic cases. Symptomatic cases would be reduced by 93.7 percent.
High protection after the first dose
The CDC also observed a high level of protection even after only one of the two mandatory doses. After one dose, the number of infections has already decreased by 80 percent. In view of the manufacturers’ own large studies, the results are logical. In these, however, it was examined how effective the substances are against the outbreak of the Covid-19 disease, not the infection rate with the virus.