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A single dose of the vaccine against Covid-19 of Pfizer o AstraZeneca It reduces by almost half the transmission of the virus in the family environment, according to a study published on Wednesday by the English health authority.
People who have been infected three weeks after receiving the first dose they had between a 38% and 49% less chance infect others in their environment who had not been vaccinated, according to the investigation by Public Health England (PHE), an advisory and support organization of the Department of Health.
By linking the contact details with the respective vaccination status, the study was able to compare the probability of contagion in a confined environment with vaccinated and unvaccinated people. Over 57,000 contacts of vaccinated people in 24,000 households were included, and compared to nearly one million contacts of unvaccinated cases.
Encouraging data
Analysis found that there is protection against Covid-19 fourteen days after vaccination at all ages. In addition, the risk of a vaccinated person developing a symptomatic infection in the first place is reduced, which is about 60 to 65%, after four weeks after a dose of either vaccine.
“Vaccines are vital for getting back to normal life. Vaccines not only reduce the severity of disease and prevent hundreds of deaths every day, but we are now seeing that they are also having the impact of reduce the risk of passing covid-19 to othersSaid Mary Ramsay, immunization manager at PHE.
Ramsay noted that while this is “encouraging” data, it is important that people act as if they are carriers of the virus and maintain hygiene and social distancing.
PASB emphasized that outbreaks are places at high risk of transmission, so this study provides evidence of the impact of vaccines on reducing transmission.
In the United Kingdom, whose vaccination plan is carried out with preparations from Pfizer, AstraZeneca and Moderna, 33.8 million people they have already received the first of two doses.
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