Vaccine side effects are not usually severe.
The side effects and the duration of the side effects from the vaccine are both much less than the symptoms of the COVID-19 virus. COVID symptoms can last for weeks, and COVID itself can cause severe long-term health issues.
The vaccine's side effects only last a few days at most and don’t have any long-term harmful effects. Everyone’s body works differently, so everyone will feel varying degrees of side effects from the vaccine. For example, some may feel sick and some may not.
Vaccine side effects are completely normal, and it means that the body is building immunity to the COVID-19 virus so you won't face the gruesome effects of the virus. Overall, discomfort from pain or fever is common but doesn’t last long.
In the case side-effects worsen:
It is also very unlikely that side-effects may worsen. In the case they do, there is no need to worry, as doctors can help cure the side effects! Please contact a doctor if:
The redness or tenderness where the shot was given gets worse after 24 hours,
If the side effects are becoming worse or do not seem to be going away after more than a few days
Source of Infographics and information are Healthline, the WHO, and India's Ministry of Health and Family Welfare.