Vaccine efficacy - activities

Covid: Moderna CEO says a fourth dose will be needed in Fall

The vaccination campaign for the third dose barely started and now, Moderna CEO is already considering a fourth dose, he thinks will be needed in Fall.

Covid: a fourth dose of vaccine? “It is a possibility”, Olivier Véran claims

At the end of the latest press brief held this December 27, 2021, Health Minister Olivier Véran claimed a fourth dose of Covid-19 vaccine was a “possibility” in France.

Covid: when faced with the Delta variant, Moderna vaccine more effective than Pfizer, according to a study

According to a preliminary US study, the Moderna vaccine is far more effective against the Delta variant of Covid-19 than the Pfizer vaccine.

Covid: reaching herd immunity through the Delta variant? Mythical, a specialist says

As many countries are trying to reach herd immunity, Professor Sir Andrew Pollard – head of Oxford Vaccine Group – said this Tuesday August 10 that reaching herd immunity through the Delta variant is not possible since this mutation will keep infecting people vaccinated. “We don’t have anything that will (completely) stop that transmission”, the expert explained to The Guardian.

Covid: vaccines effective against "all COVID-19 virus variants", WHO claims

Are Covid vaccines – developed to stop the virus in its standard strain – effective against the different variants spreading worldwide? This Thursday May 20, 2021, the World Health Organization states currently used vaccines are effective against "all COVID-19 virus variants".

Covid: the vaccine to cut by 50% risk of transmitting the virus within a household

A British study shows the vaccine cut by half risk of passing Covid-19 within a household, from the first dose.

Covid vaccine: what does 70%, 80% or 90% effective mean?

As several vaccines are beginning to share their clinical trial results, their effectiveness can be very different. 70%, 80%, 90%... What do these number mean? Keep reading to find out more!

Covid: Moderna to modify vaccine to improve its efficacy against variants

This Monday January 25, Moderna Therapeutics laboratory announced they were working on a new version of their vaccine, to make it more effective against variants, especially the South-African strain. That very same day, the group explained their product was effective against the two most spread variants in the world.

Covid: once inoculated, does vaccine prevent from spreading the virus?

According to data already made available Covid vaccines on the market or being approved protect from being contaminated, but do they prevent from transmitting the virus to somebody else? We try to answer this question.

Covid: things might go back to “normal in the Fall 2021” Pr. Arnaud Fontanet states

When will life get back to normal in France? This is a question many French are asking as the coronavirus crisis has been hitting Europe in the beginning of 2020. On BFMTV, professor Arnaud Fontanet from the Institut Pasteur said life could go back to normal “in the Fall 2021” but only if “80-90% of the French” get vaccinated.