A few days ago, a study said that a previous infectious with one of the other human coronaviruses that are responsible for the common cold could give some people COVID-19 immunity.

The initial infection that caused a regular cold would create T cells, which would then be able to recognize the novel coronavirus and accelerate the immune response against COVID-19.

Before that, a study showed that neutralizing antibodies produced after infection with SARS-CoV-2 would vanish from the immune system, prompting some to worry that reinfection might be possible within a short time.

Some of the vaccine candidates that have reached the final stage of clinical trials have induced both neutralizing antibodies and T cell responses in volunteers, which is a promising development for long-lasting immunity.

Anthony Fauci addressed the new study that explained how common colds could induce COVID-19 immunity, explaining coronavirus immunity the way it should have been done from the start.

Fauci said of the new study that it could explain why some people have no COVID-19 symptoms after being infected, while others need hospitalization and risk death.

A virologist at Columbia University used the same army analogy to differentiate the neutralizing antibodies from the T cells that can both kill infected cells and initiate the production of more antibodies.