Sinovac

Manufacturer: Sinovac – China

Effectiveness: 49.6 – 50.7%

Authorized groups: 18-60 Years old

Dosing: 2 Doses (3 Weeks between the shots)

Possible side effects: Pain at the injection site, Headache, Numbness


AstraZeneca

Manufacturer: AstraZeneca – United Kingdom

Effectiveness: 70.4-82.4%

Authorized groups: Over 18 Years old

Dosing: 2 Doses (4-12 Weeks between the shots)

Possible side effects: Pain at the injection site, Chills or shivers, Fever, Headache, Fatigue, Muscle pain, Thrombosis    


Moderna

Manufacturer: Moderna – United States

Effectiveness: 94.1%

Authorized groups: Over 18 Years old

Dosing: 2 Doses (4 Weeks between the shots)

Possible side effects: Pain, Swelling, Redness at the injection site, Chills or shivers, Headache, Fatigue


Pfizer – BioNtech

Manufacturer: Pfizer – BioNtech – United States and Germany

Effectiveness: 81.8 – 95%

Authorized groups: Over 16 Years old

Dosing: 2 Doses (3 Weeks between the shots)

Possible side effects:  Pain, Swelling, Redness at the injection site, Chills or shivers, Headache, Fatigue   


Johnson & Johnson

Manufacturer: Johnson & Johnson – United States

Effectiveness: 66.9%

Authorized groups: Over 18 Years old

Dosing: 1 Dose

Possible side effects: Pain at the injection site, Headache, Fever, Muscle pain, Fatigue, Nausea  


Sputnik V

Manufacturer: Sputnik V – Russia

Effectiveness: 91.1 – 91.5%

Authorized groups: Over 18 Years old

Dosing: 2 Doses (3 Weeks between the shots)

Possible side effects: Pain, Swelling, Redness at the injection site, Headache, Muscle pain, Rash, Fatigue    


Sinopharm

Manufacturer: Sinopharm – China

Effectiveness: 79.3%

Authorized groups: 18 – 60 Years old

Dosing: 2 Doses (3 – 4 Weeks between the shots)

Possible side effects: Pain, Swelling, Redness at the injection site, Headache, Muscle pain, Rash, Fever    


Novavax

Manufacturer: Novavax – United States

Effectiveness: 89.3%

Authorized groups: Over 18 Years old

Dosing: 2 Doses (3 Weeks between the shots)

Possible side effects: Pain at the injection site, Headache, Fever, Fatigue, Nausea, Swollen lymph nodes     


The effectiveness of the COVID -19 vaccines from each manufacturer shall not be compared because each study was made in different groups of people using various methods of research. All types of COVID-19 Vaccines have the ability to reduce the severity of the disease, shorten the duration of hospital stay, and reduce the risk of death. The sooner we can receive the vaccine, the better immunity we can build to prevent the spread of the virus.

The common side effects of the COVID-19 vaccine are just mild and moderate levels of severity, such as Pain and Swelling at the injection site, Fever, Fatigue, and Nausea. However, these side effects will be gone within 24 – 48 hours and can be relieved by taking pain-killer pills, drinking plenty of water, and taking some rest. Nevertheless, the severe side effects can occur but the probability is less than 0.00001%.  The severe side effects may occur to people who used to have severe allergic reactions after getting vaccinated. Basically, the allergic reactions such as High fever, Low blood pressure, Chest tightness, Difficulty breathing, Dizziness, and Fainting will happen within 30 minutes after vaccination.  However, these allergic reactions can be cured if the proper treatment was received.

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