2nd dose of Janssen 8 months after the first? J&J says yes

Did you get the Janssen vaccine? As part of COVID-19, there is a lot of talk about booster doses. Opinions differ as pharmaceutical companies conduct research to understand the effectiveness of the additional dose.

J&J recently confirmed the effectiveness of Janssen’s one-time booster vaccine.

Janssen booster dose increases antibodies

The Johnson & Johnson business group, through its pharmaceutical division Janssen, announced today that a single booster dose of the COVID-19 vaccine is effective in boosting immunity against the SARS-CoV-2 coronavirus. According to Johnson & Johnson, the booster dose ...

generates a rapid and sustained increase in the number of antibodies that bind the spike [do vírus], nine times more than 28 days after a single vaccination

These interim results, published today, were seen “in participants ages 18 to 55 and people aged 65 and over who received a lower booster dose from Janssen,” the company says.

A single dose of Janssen's COVID-19 vaccine triggers a strong immune response that lasts up to eight months. With this new data, we also found that the booster dose increased the antibody response among study participants who had already received our vaccine.

The next step will be "discussing with public health authorities a potential booster dose strategy eight months or longer after a single dose."

In Portugal, 17,658 people have died since March 2020 and 1,022,807 confirmed cases have been reported, according to the General Directorate of Health.

The respiratory illness is caused by the SARS-CoV-2 coronavirus, discovered at the end of 2019 in Wuhan, a city in central China, and currently variants identified in countries such as the UK, India, South Africa, Brazil or Peru.