In the Netherlands, researchers reported a death toll that was second infected with the SARS-CoV-2 virus. As the circumstances of this case suggest, it is certainly a phenomenon of rarity.
The question of how long immunity against the SARS-CoV-2 virus lasted is of interest not only to experts since its discovery. This is one of the reasons why the case of repeated infections, so-called reinfection, is well known.
It is basically a good first that so far such cases have been discovered, a worldwide article has been described in the literature. In most cases, the infections are repeated, the people have a slight course.
Don’t pay it absolutely. On the eighth of June, a group of Dutch experts published work describing the first case of repeated infection, which ended the patient’s death. (The work is available from this page in PDF.)
Describe the case of an 89-year-old woman who became infected with a gap of about two months between the first and second infections. In the first case, it was taken with heat and sludge and had a positive PCR test. But her condition did not burn and she was dismissed after five days.
Two months later, the hospital was reopened again with very similar external problems (kael, high heat, but so dullness and reduced saturation, ie the oxygen content in the blood). Her condition gradually worsened and she died after two weeks of drinking to the hospital.
As it turned out, she actually became infected twice. The experts performed a genetic analysis of the stored sample from the first PCR test and the sample taken during the type of hospitalization. It has been found that the viruses in both samples are genetically relatively detailed in detail (at least in the SARS-CoV-2 scale, which is quite stable).
For the sake of completeness, we state that the difference itself is nothing about the danger of both variants of the virus. These differed in details in the genetic code, which they could have, but much less do not affect the course of the disease. We could say that if it were people, they would simply have a different hair color in their genes.
Exception confirming the rule?
The event would be very worrying if it were not so unique. First, the patient suffered from a relatively rare tumor (Waldenstrm’s macroglobulinemia), due to which she had impaired immune function. Not because of its role, which probably plays the biggest role in the defense against SARS-CoV-2, but the furnace just didn’t have a completely immune system. Tests for SARS-CoV-2 antibodies in the patient also did not reveal this form of defense during hospitalization (and both the rapid test and the ELISA test were used).
Secondly, in other reported cases of reinfection, the general course of the disease used to be less. Of course, such statistics are still relatively simple, because the number of cases is very low. (On the other hand, there were enough cases where the reinfection was due to the high sensitivity of the test.) Even among them, there were several cases of this type of infection. This was the case of a 25-year-old patient in the USA, in whom he ran a second time in the mountains, less than two months would have passed between the two infections (meanwhile the patient had a negative test and even in his case the virus samples differed genetically).
So far, this is important to emphasize more first, similar cases of repeated orders only a few small months in a row seem to be very, very rare. As of the date of publication, according to the best available overview (BNO News), 23 of them were recorded in the world, with an average interval of 72 days.
There is no doubt that this word is full and the actual number of reinfections will be very serious. It does not seem to be a completely common problem that would affect a large hundred of the total number of millions of people who sold the disease. However, the evidence suggests that the SARS-CoV-2 virus may be limited in some way among people who have encountered it.
On the other hand, it is true that the immune system is gradually improving in the fight against new pathogens. Otherwise, at the first meeting, his answer is generally higher than at the second, and every other time. However, we observe this especially in children, because in adulthood we often do not encounter fully new pathogens.
The current cases of reinfection have at least not yet diminished the general optimism about the development of the vaccine.