Why do some people not become infected when exposed to novel Coronavirus?

Why are some people able to resist contracting COVID-19 despite living with someone who has the disease?

Please note that, as with other diseases, the Novel Coronavirus has factors that increase its reproductive risk, but also factors that reduce it. A number of epidemiologists are trying to understand, both biologically and morphologically, why some people are not infected with the Novel Coronavirus. The research Angle included blood type. He noted that it is widely believed that people with type O blood have A lower risk of novel Coronavirus infection of about 20%, while those with type A and AB blood have A higher risk.

Catch a cold

The effectiveness of the immune system is another factor that reduces the risk of infection, and it varies from person to person. Due to pre-existing immunity, some people have a lower chance of contracting novel coronavirus infections than others. A cold allows the body to make T cells that react more quickly with the Novel Coronavirus SARS-COV-2, which causes COVID-19, and the discovery could form the basis for new vaccines that make T cells provide a longer-lasting antibody response, unlike current vaccines that target spike proteins that tend to mutate easily and lose their effectiveness.

Genetic factors

In addition to blood type and immunity, there is another genetic factor that reduces the risk of infection. Many studies have shown that genes play an important role in preventing severe symptoms following novel coronavirus infection. However, the effectiveness of COVID-19 vaccines diminishes over time, most notably in terms of infection and symptom intensity.


The rate at which this happens depends on the vaccine, the virus mutation, and the individual situation. It also has to do with when a person may become susceptible to a breakthrough viral infection. If you have recently received a vaccine and booster shot, you will have maximum immune protection.

Past infections may play a role

Past infections may also play a role, in addition to complicating factors such as personal protection and risk of infection.

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