Collective immunity from the coronavirus, which was talked about at the very beginning of the pandemic, has not been achieved in almost any country in the world. The first strain was replaced by alpha, beta, gamma, and delta, which means that 60 percent that was required to stop the spread of infection is no longer enough.

SASR-CoV-2 has become more aggressive and is spreading at a faster rate. Moreover, doctors say that the delta (Indian) strain leads to a more severe course of COVID-19. But the good news is that well-known vaccines, so far protect against all existing varieties of coronavirus. But why are these vaccines two-factor? Is it really impossible to do with one vaccination?

First, the body gets acquainted with a new pathogen and puts it in memory – if the pathogen appears somewhere, it will protect itself from it. This happens during the first vaccination. It is especially good if this vaccine is injected into the body again after three to five weeks. At this moment, the body activates the already prepared immunity. And now almost all vaccines are at least two-component. The first injection is an introduction, the second is the activation of immunity. In this case, you are protected.

But how long the powerful protection against coronavirus, formed after a two-factor vaccination, lasts is still unknown. Research in this area is continuing. Now doctors are inclined to believe that about six months after the second phase, you should be revaccinated. In this case, only one dose of the drug is injected into the body – there is no need for two-factor vaccination.

The human immune system is complex; it is not easy to predict how much protection works. Those who were vaccinated six months ago certainly have some protection. If someone now infects him with the coronavirus, he will calmly get sick at home as a small SARS. But I would like not to get infected at all, and according to statistics, after one injection of revaccination, the probability of infection again decreases to very low. Even with this new “delta” strain, which, unfortunately, is more likely to break through the protective vaccine.