THE QUESTION
. "
Vaccines lose part of their effectiveness after 5 to 6 months
", declared the president of the Scientific Council on the airwaves of
France Inter
, adding that this decrease in effectiveness concerned "
the oldest and most immunocompromised people
", but also "
the general population
". If the vaccine protects against "
the occurrence of severe forms and serious forms
", recalled Jean-François Delfraissy, antiCovid vaccines protect "
relatively little or even badly against infection and transmission of the virus
".
If this drop in efficacy has been widely documented in the scientific literature for several months, some recent studies have shown increasingly worrying figures concerning this decrease in the protection of the vaccine.
A graph taken from a "
Swedish study
" was relayed to this effect on Twitter showing a vaccine efficacy curve decreasing sharply and even dropping below zero.
"
There is no efficacy of the vaccine against infections
", comments the user even suggesting that vaccinated people could be less protected than unvaccinated.
What is it really?
How long is the immunity conferred by the vaccine?
Are we talking about weeks, months or years?
Does this duration depend on age?
Read also Covid-19: the virus is back on the executive's agenda
CHECKS
.
The study widely relayed on social networks is a Swedish manuscript submitted for publication in the journal
The Lancet
.
It actually shows that the effectiveness of vaccines against "
symptomatic Covid-19 infections
" generally falls below 60%, six months after the injection of the last dose, and adds that "
from day 211 and on - beyond that, no efficiency has
This article is for subscribers only.
You have 77% left to discover.
Pushing back the limits of science is also freedom.
Continue reading your article for € 1 the first month
I ENJOY IT
Already subscribed?
Log in
