Now that there are no more distinctions of age group or categories for access to vaccination, a possible third dose is being discussed (except for Johnson & Johnson, the only vaccine that involves a single administration).
Emergency Commissioner Francesco Figliuolo announced that 80% of Italians will be vaccinated by the end of September. And on a possible third dose, to Ansa he confirmed: "At the moment, the belief of most scientists is that" immunity has a duration of about a year and, therefore, it is necessary "to organize ourselves for the recalls" says the general who just today had a meeting with the Ministry of Health and Civil Protection on how to organize and manage this new phase, also in light of the variants that continue to mutate the virus.
spike that triggers the immune response. Of the vaccines administered today, Moderna has started a trial with a specific vaccine for the beta variant B.1.351 (discovered in South Africa), with the aim of enhancing the immune response against the variants.it is still valid. The "shield" against Covid-19 given by the vaccine, by analogy with other vaccines, could even last a year.
To date, however, there is no test that can ascertain the duration of protection for any vaccine currently being administered. By monitoring the post-vaccine immune responses globally, a "hypothesis can be formulated among the most accredited: boosters will be necessary, but it is not yet defined how and when they will be performed. Scientific studies to date have produced heterogeneous data, but show how post-infection immunity, although it varies from subject to subject, decreases over time but generally lasts at least 6 months. It is not even known what level of immunity is able to project from a possible new contagion. Especially if we are talking about variants.
A recent study observed the presence of cells capable of producing antibodies about a year after negativization. This tells us that immunity can have a long duration, thanks to the work of these cells that produce antibodies against the Coronavirus.
, in the over 65 bracket. , which is repeated every 10 years), or heterologous, as is, for example, the flu vaccine, which is remodeled and targeted every year to be effective against a different viral strain.
In summary: the homologous recall is what should be done in the event that the immune response is waning to the point of exposing people to a new infection against the same variants known today. The heterologous recall, on the other hand, is what would be done against new possible Covid-19 variants, which the vaccines available today would no longer be able to effectively counter and neutralize.
There does not seem to be a dangerous relationship between vaccine against Covid-19 and alcohol in moderate quantities.
