Vaccine failures resulting in severe cases of Covid-19 infection are raising concerns about the effectiveness of Janssen’s (Johnson & Johnson) anti-Covid vaccine. In the vaccine arsenal against the Covid authorized in France, this vaccine can be administered in a single dose and has proven to be effective, in clinical trials, of nearly 67% two weeks after this single injection. In a report published on September 13, the National Agency for the Safety of Medicines and Health Products (ANSM) listed 29 serious cases of Covid, including 4 deaths, in people vaccinated with Janssen since April 24, the beginning of the use of this vaccine in the vaccination campaign, and until September 2. A failure rate that L’Usine Nouvelle compared to those of other vaccines.
The anti-Covid Janssen vaccine appears to be less effective than the Pfizer, Moderna and AstraZeneca vaccines
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