In the study, scientists checked data on changes in the level of specific antibodies (IgG) in Russians who had had COVID-19. The project was attended by 1421 people aged 18 to 70 years.
They said that the severe course of coronavirus infection, increased body weight and a high percentage of lung damage have a positive effect on the amount of antibodies produced.
In addition, scientists have proven that older people have antibodies to COVID-19 for the longest time. According to experts, testosterone can also affect the production of antibodies, which weakens the immune defense.
A study conducted by these scientists confirmed that after suffering a coronavirus, immunity to it lasts for about six months.
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