Tag: immunity
Covid-19: is immunity to the virus more effective after a vaccine or an infection?
In the public health challenge of the fight against the Covid-19 pandemic, the best protection is undoubtedly vaccination. “The risk-benefit ratio, for the population, is in its favor”, guarantees Jean-Daniel…
Super immunity and Covid-19: when antibodies are much more powerful in fighting the virus
Being vaccinated and then contaminated would offer an exceptional level of immunity, called “super immunity”. What is it exactly? Does it also work the other way around, i.e. getting infected…
Covid-19: A third dose on top of two doses of Sinovac vaccine boosts immunity
According to a new study, the third dose of AstraZeneca, Pfizer-BioNTech or Johnson & Johnson vaccine against Covid-19, administered on top of two doses of Sinovac vaccine, significantly increases the…
Omicron Destroys Hopes of “Herd Immunity”
While the Omicron variant of the Corona virus continues to spread faster than previous variants, it is not expected to provide herd immunity in populations. Since the beginning of the…
”Natural Immunity is More Protective Against Delta than Vaccine”
A study in the states of California and New York revealed new data on Delta, which was rapidly the dominant variant in the US and many parts of the world…
Common cold coronavirus immune cells confer protection against SARS-CoV-2
Immunity keeps track of past infections. Everyone has had a cold, a mild infection sometimes caused by coronavirus. According to a recent study, immune cells formed during a cold may…
Vitamin D: should it be taken in winter?
Vitamin D is made by the skin when exposed to sunlight. In winter, in the latitudes of mainland France, we risk suffering from a vitamin D deficiency. So, should we…
Is immunity better after a vaccine or after a natural infection?
A Covid-19 infection produces a different immunization than the vaccine, the latter appearing to be more effective in protecting against a new infection. How to explain this superiority of the…
Collective immunity: what is it?
Collective immunity makes it possible to put an end to a epidemic and is the percentage of a population that is immune to a disease. This group immunity can be…
90% vaccinated and still no collective immunity?
Collective immunity seemed to be the goal to be achieved a few months ago. Today, 90% of the adult population is double vaccinated … And the end of the epidemic…