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Does low antibody levels protect against covid infection?



However, antibody levels are not yet compulsorily measured in some countries. This may be partly due to the fact that such an analysis is somewhat more expensive (in Russia it is more than 1,000 rubles, and the purchase price of Sputnik V is about 900 rubles). In some countries, such an analysis cannot be passed without a doctor’s referral. Finally, the third reason is the difficulty in interpreting the results of various test systems, as well as the lack of reliable data on the protective properties of antibodies.

How many antibodies do you need to have in order not to get infected? The author writes that at 300-370 BAU / ml, most will not become infected if they encounter the Delta strain. However, it all depends on the individual characteristics of the organism and the way of interacting with an infected person. For example, if you sing karaoke with him, you can catch a virus even with a large number of antibodies. There is also a variant of the asymptomatic course of the disease with this level of antibodies.

But even if the results show that you have values ​​well below 300-370 BAU / ml, you still have protection that will reduce the risk of infection. Therefore, if you encounter a small dose of virus particles, you will not get sick. Also in this case, you can achieve a high degree of protection, but only if you wear a respirator and do not go to karaoke bars.

However, if your antibody level is below 150 BAU / ml, then it is advisable to undergo revaccination. At the same time, it is imperative to revaccinate the elderly because of the reduced immunity and the high probability of infection.

And the last – regardless of the level of antibodies, the molecular biologist concludes, it is necessary to continue to wear personal protective equipment.

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