According to a new study, a reduction of the immune system occurs after two months from their second vaccination in many adults who have been infected with COVID-19. But the importance of receiving a second dose is not just that it gives your body another chance to develop an immune response. It also protects you from the delta virus, which is very contagious.
The assumption that contracting COVID will naturally make someone immune to re-infection is not necessarily true either, according to the study. Although it was previously believed that those who have had the COVID will develop a high level of antibodies and will be able to fight off a re-infection, the study showed that this assumption is false.
“Our study shows that prior exposure to SARS-CoV-2 does not guarantee a high level of antibodies, nor does it guarantee a robust antibody response to the first vaccine dose. For people who had mild or asymptomatic infections, their antibody response to vaccination is essentially the same as it is for people who have not been previously exposed,” explained one of the authors of the study.
Accounting for age, gender, race, and other factors, researchers looked at data from thousands of patients who were given both the Pfizer and Moderna vaccines to see how long the immunity benefits of each last and how well they protect against newer variants. All patients had tested positive for COVID-19 before.
When compared to those who tested positive but were asymptomatic or had mild symptoms, individuals who tested positive and had clinically confirmed cases showed a higher antibody response. Many people and doctors used to think that those with prior exposure to SARS-CoV-2 will be immune. They aren’t sure if this immunity will be permanent, so they still recommend vaccination.