Confirmed reinfection cases are occurring in different parts of the planet. The differences in the genome sequences of the SARS-CoV-2 virus are showing that reinfections are due to different strains (a viral variant). Because the alternative is that it is the same virus as persisted in the body of the subject.
At this time, there is still no evidence that a variant of SARS-CoV-2 has emerged that is capable of evading the immune response that provides protection from previous exposure to the aforementioned virus.
“Natural immunity it is no more reliable than that produced by a vaccine”
Herd immunity: rejected
The possible strategy, postulated at the beginning of the pandemic, of overexposing the population and causing a “herd immunity”Forced, falls under its own weight. To the deaths it would cause, and the consequent sanitary collapse, another one is added: Natural immunity it is no more reliable than that produced by a vaccine.
Therefore, it is more unpredictable to rely on a exposure acquired immunity to the Covid-19 virus.
Coronavirus is a seasonal virus, and many cause mild upper respiratory infections. The first infection of many viruses provides lifelong immunity.
But immunity from seasonal coronaviruses is short-lived. There is reasonable doubt about the duration of immunity from vaccines of SARS-CoV-2. Immunity may persist for a few months and it may be necessary to re-vaccinate later.
“More and more cases of reinfection by COVID-19 that come to light ”
There is no certainty about it. I don’t even want to think about the chaos that a second Covid-19 vaccination would cause, without even knowing when the first one will start.
For some viruses, the first infection can provide lifelong immunity; for seasonal coronaviruses, protective immunity is short-lived. More and more cases of COVID-19 reinfection are coming to light. However, it is not a real concern at this time, as published in The Lancet.
“There is no evidence that we are able to vaccinate against the flu faster and more people”
If we are not being able to get flu vaccinated on time, as if to think about adding a second Covid-19 vaccination which should be as fast as we can. There is no evidence yet that we will be able to vaccinate against the flu faster and in a larger population. And we know that it returns and repeats for years. Something will have to be done that we are not doing.
Experts say that the best way to immunize the population is through a vaccination strategy. But strategies must be able to be executed effectively.