Study reveals single vaccine dose can reduce household transmission of COVID-19 by up to half


According to a study by Public Health England released on Wednesday, a single dose of the COVID-19 vaccine can limit household transmission by up to half. This shows the effectiveness of the vaccines in preventing spread.


According to The Hill, the research -- which has yet to be peer-reviewed -- found that people who got COVID-19 three weeks after receiving one dose of either the Pfizer-BioNTech or AstraZeneca vaccines were between 38 per cent and 49 per cent less likely to give the virus to those in their household, compared to those who didn't receive any vaccine dose.


Public Health England analyzed more than 57,000 contacts from 24,000 households in which a person who had received a vaccine dose tested positive for the virus and compared it with almost 1 million contacts of cases among unvaccinated people.


Meanwhile, The Pfizer and Moderna vaccines were 94 per cent effective in preventing hospitalization for COVID-19 among people age 65 and older, according to a US Centers for Disease Control and Prevention (CDC) study released Wednesday.

In the US, as more people are vaccinated, deaths from COVID-19 have fallen markedly, from highs in January of more than 3,000 per day to about 650 per day currently, according to CDC data.