SARS-CoV-2 has become the main enemy of all citizens of the planet. The virus, which has been circulating around the world for a year and in Europe, for just over eight months, it has claimed the lives of more than a million people and infected more than 55 million.
However, researchers from all corners of the world are striving to find answers to all the questions posed by this new virus. One of the most hypotheses is to know if there is and how long immunity to coronavirus lasts in people who are infected.
Immunity can last for years
To solve this question, they work on the La Jolla Institute of Immunology (California, United States) and Mount Sinai School of Medicine (New York, United States). After an extensive study, scientists have concluded that, eight months after infection, many of those infected maintain a sufficient immune load to prevent a new infection, possibly for several years.
The results of this research have not yet been approved by the scientific community, but it is a great step to learn more about this virus that is doing so much damage throughout the planet. Since it is the first to incorporate measurements of four types of immune response: IgG antibodies, memory B cells, and two types of T cells.
The sample consisted of 185 subjects, whose age was between 19 and 81 years old and who had already overcome COVID-19 with mild symptoms. Nearly 40 of those people provided multiple blood samples during the period and no one had to be hospitalized.
Shane Crotty, one of the authors and authors of the study, has said in the American media The New York Times: “The identified dose of immunity can prevent most people from suffering severe symptoms or being hospitalized.”
Good news for vaccine researchers
This fact is good news -if it is confirmed- for researchers developing the various COVID-19 vaccines, since it opens the door to the administration of doses not having to be repeated frequently as immunity is maintained for several years.
The question that remains: the cases of reinfected
Although several investigations, like this one, conclude that overcoming the disease provides the body with a series of immunity to the virus, Around a dozen cases of possible reinfection have been known in the world. However, some experts suggest that it could be a reactivation of some ‘dead parts’ of the virus within the body or a new infection by a different strain of the virus.