What happens to the human body's immunity after coronavirus infection and the necessary treatment; How long does it last?; Experts from Britain who conducted a relevant research give answers.
"I have immunity," said Donald Trump, returning to the election campaign after being treated for coronavirus.. "I want to kiss you", the American president shouted to his enthusiastic followers, but in the end he did not keep his promise. It was probably better that way.
If anything, because no one knows if the White House resident has actually developed immunity. The question of how long a physics lasts immunity of the organism after infection, is busy, όπως εξηγεί σε σχετικό της ρεπορτάζ η Deutsche Welle, scientists from the beginning of the pandemic. Recent research by scientists at Imperial College London, in sample 365.000 people, leads us to conclusions that do not seem particularly encouraging.
British scientists find that natural immunity declines even after a relatively short period of time. However, it depends on many factors and especially on age.
According to this research, in patients over 75 years old immunity seems to decline at a much faster rate than at a young age. However, the duration of immunity also depends on the severity of the disease.
Another interesting conclusion was that in health care workers the immunity takes longer to subside, which may be due to more intense or even more frequent exposure to the virus.
Consequently, scientists at Imperial College conclude, the answer to the question, if the immunity lasts for weeks or months, is given on a case by case basis and depending on the patient.
"If you test positive for antibodies, this does not mean that ex’ by definition you have developed immunity to the coronavirus ", warns Professor Paul Eliot, points out that the restrictive measures regarding the keeping of distances and the use of a protective mask should be observed in this case as well..
In another recent study by Harvard University School of Medicine in collaboration with the University of Toronto, found to have the highest levels of antibodies detected in the body two to four weeks after infection, but then began to recede.
However, says lead researcher Russell Charles, antibodies generally remain high for four months after infection and this is a strong indication that’ during this time the body is protected "from a new infection. However, there is no definitive scientific proof yet.
Where do the different assessments of immunity come from?
Obviously this has to do with the place and time of the research, but also the range of the sample. For example, researchers had identified antibodies in the 20% of those examined in New York, in Heinsberg the corresponding percentage was 15%, while in Isgl 40%.
The percentages were different, although in all three cases we are talking about the first outbreaks in the US, Germany and Austria respectively.
In China, asymptomatic patients were studied in Guangzhou Province, in which however they participated only 37 humans and scientists have concluded that antibodies disappear just two months after infection.
From the other side, corresponding research by the University of Arizona in 6.000 individuals detect high levels of antibodies even for five months after infection.
Researchers at Imperial College now find that from early June to late September, the proportion of the population with antibodies has declined since 6% in the 4,4%. This indicates a very short duration of immunity.
It is noted, however, that the results of many surveys (such as that of Imperial College) are not considered definitive, as they are still in the preprint phase, that is, not all the steps provided in the research protocols have been completed and in addition they have not been published in a scientific journal.
So in summary- if nothing else all researchers agree on this- The issue of coronavirus immunity has not yet been adequately investigated.
Anyone who has had the infection should not take action;
And yet, must comply with all measures! Από νομικής απόψεως έτσι κι αλλιώς δεν προβλέπεται διαφορετική μεταχείριση ανάμεσα σε εκείνους που έχουν ήδη νοσήσει και στους υπόλοιπους.
Αλλά και από ιατρικής απόψεως η τήρηση των περιοριστικών μέτρων κρίνεται απαραίτητη για όλους. First, γιατί δεν έχει απαντηθεί ακόμη οριστικά το ερώτημα για τη διάρκεια της ανοσίας. Secondly, γιατί έχουν γίνει γνωστά αρκετά περιστατικά νέας λοίμωξης σε μικρό χρονικό διάστημα μετά την πρώτη λοίμωξη.
End, υπάρχουν ενδείξεις ότι μερικοί άνθρωποι δεν δημιουργούν καν αντισώματα μετά τη λοίμωξη. Παλαιότερη έρευνα σε περίπου 380 άνδρες του αμερικανικού πολεμικού ναυτικού δεν διέκρινε αντισώματα στο 41% των εξετασθέντων. Αντίστοιχη έρευνα του Πανεπιστημίου Φουντάν στη Σανγκάη δεν κατέγραφε αντισώματα στο 6%.
Simply put, δεν είμαστε καν βέβαιοι ότι όλοι όσοι περνούν τη λοίμωξη αναπτύσσουν ανοσία, έστω και για μικρό χρονικό διάστημα.