After vaccination, the immune system learns to recognize specific parts of the virus. This preparation allows the body to respond more quickly in case of infection. However, viruses can still enter the body and begin to replicate before the immune response is fully activated.
For this reason, infections can occur even among fully vaccinated individuals.
Health authorities around the world have repeatedly stated that COVID-19 vaccines remain highly effective at preventing severe illness, but cannot guarantee that all vaccinated individuals will completely avoid infection.
Why do infections that disrupt the market occur?
Several factors contribute to COVID-19 infections among vaccinated people.
1. Viruses change over time.
Like many viruses, SARS-CoV-2 is constantly evolving through mutations. New variants can partially evade immune defenses developed through vaccination or previous infection.
While vaccines generally continue to offer strong protection against serious outcomes, their effectiveness against the infection itself may decrease as new variants emerge.
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