COVID-19 Vaccines and Their Side Effects
Following our previous discussion on how vaccines work, this section focuses on the characteristics of different COVID-19 vaccines, ways to reduce post-vaccination side effects, and an overview of several vaccines that have been widely used around the world.
Research has shown that COVID-19 vaccines play a significant role in reducing the severity of infection and lowering the risk of death caused by the coronavirus. For this reason, many countries have developed and produced effective vaccines.
Characteristics of Different COVID-19 Vaccines
| Vaccine Brand | Eligible Recipients | Number of Doses | Fully Vaccinated | Effectiveness |
|---|---|---|---|---|
| Pfizer-BioNTech | Individuals aged 12 years and older (16 years and older in some cases) | 2 doses (second dose administered 3 weeks after the first) | 2 weeks after the second dose | 91.3% |
| Moderna | Individuals aged 18 years and older | 2 doses (second dose administered 4 weeks after the first) | 2 weeks after the second dose | 94.1% |
| Johnson & Johnson (Janssen) | Individuals aged 18 years and older | 1 dose | 2 weeks after vaccination | 66% |
| Oxford–AstraZeneca | Individuals aged 18 years and older | 2 doses | 2 weeks after the second dose | 81.31% |
| Sinopharm | Individuals aged 18 years and older | 2 doses | 2 weeks after the second dose | 86% |
| Sputnik V | Individuals aged 18 years and older | 2 doses | 2 weeks after the second dose | 94.3% |
Possible Side Effects After COVID-19 Vaccination
COVID-19 vaccines, which are administered to help prevent severe illness caused by the coronavirus, may cause side effects that can temporarily affect daily activities. These reactions are completely normal and indicate that the immune system is responding to the vaccine. Side effects usually last only a few days, and some people experience no side effects at all.
It is important to note that side effects may be more noticeable after the second dose of a two-dose vaccine. In most cases, this is not a cause for concern. It simply means that the body is producing antibodies and building protection against the virus. These symptoms typically resolve within a few days. If symptoms persist for more than two days or become severe, consult a healthcare provider.
For vaccines that require two doses, individuals are generally considered fully vaccinated two weeks after receiving the second dose. For single-dose vaccines, full vaccination is achieved two weeks after the single injection. During this period, it is essential to continue following all recommended preventive measures against COVID-19, just as before vaccination.
In some cases, a person may become infected with COVID-19 shortly before or immediately after receiving the vaccine and develop symptoms of the disease. This does not mean that the vaccine is ineffective. Rather, the body has not yet had enough time to develop protective antibodies.
Consult your healthcare provider before taking any medication to relieve vaccine-related side effects.
Common Side Effects
- Pain, redness, and swelling at the injection site
- Fatigue
- Headache
- Fever
- Chills
- Nausea
- Muscle aches
Ways to Reduce Side Effects
- Apply a clean, cool, damp cloth to the injection site.
- To reduce pain and inflammation, gently use or exercise the affected arm during normal daily activities.
- Drink plenty of fluids and wear lightweight clothing to help reduce fever.
