Vaccines don’t magically block the virus. They can’t kill the virus or pathogen.
All the vaccines stimulate your immune system to create antibodies that perform specifically against the virus. As a result, vaccines allow the body to fight infection before it takes charge and causes severe illness.
Some people are not strong enough and may still be vulnerable to developing COVID-19. How a person responds to the vaccine depends on:
Bear in mind that vaccines aren’t 100% effective. Moreover, not everyone who is vaccinated will respond to the vaccine equally. For instance, the elderly or people whose immune system is faulty are less likely to stay robust than youngsters, even after receiving the shots.
Also, the risk of dying from Covid-19 rises with age. So even if the vaccine reduces an 80-year-old’s risk of death by 95%, their risk of death might still be more significant than an unvaccinated 20-year-old.
Another practical factor in increasing the risk is chronic illnesses. For instance:
As a higher amount of the population gets vaccinated, fewer unvaccinated people remain. Then it is possible that death in the older, vaccinated group would equal or exceed deaths in the younger, unvaccinated group. That’s why all people should still keep their distance, despite receiving the COVID-19 vaccine.