Covishield is a COVID-19 vaccine developed by Oxford University and AstraZeneca, and manufactured by the Serum Institute of India. The vaccine has been authorized for emergency use in several countries, including India, and has been shown to be effective in preventing COVID-19 infections. In this article, we will discuss the mechanism of action, effectiveness, and side effects of Covishield.
What is Covishield?

Covishield is a vaccine designed to protect against the SARS-CoV-2 virus, which causes COVID-19. It is made using a weakened version of a common cold virus (adenovirus) that has been modified to contain a gene for the spike protein of the SARS-CoV-2 virus.
Once the vaccine is injected, the immune system recognizes the spike protein and produces antibodies to fight it. This way, if the person is later exposed to the SARS-CoV-2 virus, their immune system is already primed to fight it off.
Mechanism of action
Covishield is a viral vector vaccine, which means it uses a harmless virus to deliver a piece of genetic material from the SARS-CoV-2 virus into the body. The genetic material, which is called messenger RNA (mRNA), instructs cells to produce a spike protein found on the surface of the SARS-CoV-2 virus. The immune system recognizes the spike protein as foreign and produces antibodies to fight it. If the individual is later exposed to the SARS-CoV-2 virus, these antibodies can help protect them from COVID-19.
How effective is Covishield?
Clinical trials have shown that Covishield is highly effective at preventing severe illness, hospitalization, and death from COVID-19. In clinical trials, the vaccine was found to be 70% effective after the first dose, and up to 90% effective after the second dose, which is given 12 weeks after the first.
Who can get Covishield?
Covishield is authorized for use in adults aged 18 years and older. In some countries, such as India, the vaccine is also authorized for use in those aged 12 years and older. However, pregnant and breastfeeding women are advised to consult with their healthcare provider before getting vaccinated.
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Where is Covishield available?
Covishield has been approved for emergency use in several countries, including the United Kingdom, Brazil, and Mexico, among others. In India, Covishield is manufactured by the Serum Institute of India and is one of the main vaccines being used in the country’s vaccination campaign.
Are there any side effects?
Like all vaccines, Covishield can cause side effects. The most common side effects are pain and tenderness at the injection site, headache, fatigue, muscle pain, and chills. These side effects are usually mild to moderate in severity and resolve within a few days. In rare cases, more serious side effects have been reported, such as blood clots and low platelet counts. However, these cases are extremely rare and the benefits of vaccination far outweigh the risks.
- Pain and swelling at the injection site
- Fatigue
- Headache
- Muscle aches and pain
- Fever and chills
These side effects are usually mild to moderate in severity and resolve on their own within a few days after vaccination. They are a sign that the body is mounting an immune response to the vaccine and are not a cause for concern.
Uncommon side effects of Covishield
While rare, some individuals may experience more severe side effects after receiving Covishield. These side effects include:
- Allergic reactions: Some individuals may experience an allergic reaction to one or more components of the vaccine. Symptoms of an allergic reaction may include hives, swelling of the face and throat, difficulty breathing, and rapid heartbeat. It is important to seek immediate medical attention if you experience any of these symptoms after receiving the vaccine.
- Blood clotting disorders: There have been reports of blood clotting disorders, such as cerebral venous sinus thrombosis (CVST), in individuals who received Covishield. However, these cases are rare, and the benefits of vaccination outweigh the risks for the vast majority of people.
- Guillain-Barré Syndrome (GBS): There have been reports of GBS in a small number of individuals who received Covishield. GBS is a rare disorder in which the immune system attacks the nerves and can cause muscle weakness and paralysis. Again, the benefits of vaccination outweigh the risks for most people.
Overall, Covishield is a safe and effective vaccine for preventing COVID-19 infections. While some individuals may experience side effects after vaccination, these are generally mild and resolve on their own within a few days. If you are concerned about the side effects of Covishield, speak with your healthcare provider or a trusted medical professional to learn more about the benefits and risks of the vaccine.
it is important to note that Covishield has been authorized for emergency use by the World Health Organization (WHO), which has deemed the vaccine safe and effective for use in adults aged 18 years and older. The vaccine has also been approved for use in several countries, including the United Kingdom, Brazil, and Mexico, among others.
Covishield has been shown to be effective against the original strain of the SARS-CoV-2 virus, as well as some of the newer variants, such as the Delta variant. While the vaccine may be less effective against some of the newer variants, it still offers significant protection against severe illness and hospitalization.
It is important to note that while Covishield and other COVID-19 vaccines are an important tool in the fight against the pandemic, they are not a replacement for other preventative measures, such as wearing masks, practicing social distancing, and practicing good hand hygiene. These measures are still important to help prevent the spread of the virus, even among those who have been vaccinated.
Overall, Covishield is a safe and effective vaccine that offers significant protection against COVID-19 infections. If you are eligible to receive the vaccine, it is recommended that you do so to help protect yourself and others from the virus.
Important key points of Covishield
Here are some key points about Covishield:
- Covishield was developed by the University of Oxford and pharmaceutical company AstraZeneca, and is based on a viral vector platform.
- The vaccine has been approved for use in several countries, including India, the United Kingdom, and several other countries in Europe, Africa, and Asia.
- Like all vaccines, Covishield can cause side effects, although these are generally mild and go away on their own within a few days. The most common side effects include pain, swelling, and redness at the injection site, as well as fever, fatigue, headache, and muscle pain. Some people may also experience nausea, vomiting, or diarrhea after getting vaccinated.
- There have been some reports of blood clotting disorders in people who have received Covishield, although these are very rare. The European Medicines Agency (EMA) has conducted a review of these cases and has concluded that the benefits of the vaccine outweigh the risks.
- Covishield is being used as part of India’s COVID-19 vaccination drive, and the Indian government has set a target of vaccinating all eligible adults by the end of 2021.
- The vaccine is available free of charge at government-run vaccination centers in India, and is also available for purchase at private healthcare facilities. However, there have been reports of shortages of the vaccine in some parts of the country, and some people have faced difficulty in getting vaccinated.
- If you have any questions or concerns about Covishield or any other COVID-19 vaccine, talk to your healthcare provider or a qualified medical professional. They can provide you with more information about the vaccine, its risks and benefits, and help you make an informed decision about whether to get vaccinated.
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In conclusion,
Covishield is a safe and effective vaccine that can help protect against COVID-19. If you are eligible to receive the vaccine, it is recommended that you do so to help protect yourself and others from the virus. comment us
FAQs:
Q. What is Covishield?
Covishield is a COVID-19 vaccine developed by Oxford University and AstraZeneca and manufactured by the Serum Institute of India. It is a viral vector vaccine that uses a weakened version of a common cold virus (adenovirus) to deliver genetic material from the SARS-CoV-2 virus that causes COVID-19 into cells to trigger an immune response.
Q. Is Covishield safe?
Yes, Covishield is considered safe for use in adults aged 18 years and older. It has been authorized for emergency use by the World Health Organization (WHO) and has undergone rigorous testing in clinical trials to ensure its safety and efficacy. Like all vaccines, Covishield can cause side effects, but these are generally mild and resolve on their own within a few days.
Q. What are the common side effects of Covishield?
The most common side effects of Covishield include pain and tenderness at the injection site, headache, fatigue, muscle pain, and chills. These side effects are usually mild to moderate in severity and resolve within a few days. They are a sign that the body is mounting an immune response to the vaccine and are not a cause for concern.
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