According to a study published in the "Lancet" newspaper, which specializes in medical affairs, a person who is infected with corona becomes very important natural immunity, which protects him from severe complications of "Covid 19", if he is infected again.
The study was based on a review of 65 specialized studies on natural immunity. That is, those obtained by infection with the virus, and it was found that it protects by 88 percent from the possibility of death and hospitalization due to the epidemic.
The researchers revealed that natural immunity gives this strong immunity, during the ten months following infection with the Corona virus, which appeared in China, in late 2019, and then turned into a global pandemic.
The study did not include the Omicron sub-mutant; Known as "XBB.1.5", which is the most widespread in the United States, at the present time.
However, the natural immunity obtained through infection gives 36 percent immunity against the "BA.1" mutant, for a period of up to ten months.
Researcher Stephen Lim, from the University of Washington, warned that the vaccine is still the safest way for a person to obtain immunity against "Covid 19", while natural immunity through infection may be marred by the risks of severe disease, and possibly death.
Experts say that vaccination is still necessary, especially among people who are most vulnerable to complications, such as the elderly over sixty, as well as those who suffer from several diseases at the same time.
Earlier, a study conducted under the supervision of the World Health Organization confirmed the great benefit of what has become known as "hybrid immunity"; That is, the immunity that occurs in the human body when it combines vaccine immunity and infection immunity at the same time.
The study showed that "hybrid immunity" is 97 percent effective, during the first year, in protecting against the risks of hospitalization and death due to "Covid 19" disease.