Usually, people who have had covid disease develop antibodies. It strongly depends on the severity of the disease.
If a person almost died from covid, then there will be a lot of antibodies.
If the person was not too sick, then antibodies may not be found at all.
It is generally accepted that a good titer of antibodies remains in the blood of a person who has been ill for about six to eight months.
Titre is the dilution of our blood serum, in which antibodies are found.
That is, to begin with, the serum is slightly diluted and antibodies are detected there by some method. Then the whey is diluted more and more. And if the serum has already been very strongly diluted, but antibodies are still being found, then these antibodies were clearly too many. Therefore a 1/128 title will be much better than a 1/32 title. Because the serum was diluted as much as 128 times, but antibodies are still found in it.
So, usually after covid, antibodies are found for several months.
True, in some studies, a normal titer was found only within one and a half months after covid. This is somehow not entirely clear.
Even in similar studies, special lymphocytes were found, which were sharpened for the release of antikoid antibodies.
It is said that these lymphocytes mature for several months and are ready to start churning out antibodies at any moment. Even if right now there are few antibodies in the blood. This is already pleasing.
It is generally accepted that those antibodies that appear after covid, they not only inhibit the development of a severe infection, but also prevent infection. That is, such people and smears will be negative.
Vaccines are more complicated. As far as I understand, while scientists draw conclusions only on those experimental data that they received on monkeys a year ago.
The monkeys were vaccinated and then shoved the virus into their nose. Vaccinated monkeys got rid of the virus in their noses faster than unvaccinated monkeys. This is also pleasing.
Let's hope that when we are all properly vaccinated, we will not sneeze out the virus that accidentally got into our nose for too long.
Well, here it should also be noted that if you are going to be vaccinated, then it is not advised to check antibodies either before or after vaccination. Because, firstly, a bunch of laboratories test them in a bunch of different ways, and, secondly, they have not fully figured out what exactly antibodies should mean.
