What You Need to Know About COIVD-19 Vaccines




Vaccines save millions of lives annually. The development of safe and effective covid-19 vaccines is a big step forward effort to end the pandemic.

The production of vaccines against coronavirus has given a glimmer of hope for a return to life in the world. To get to know these vaccines better we will be listing a comparison of the types of coronavirus vaccines. But first, let us answer some questions about this pandemic

Are covid-19 vaccines safe?

Yes, it’s safe. Although the development of covid-19 vaccines were as quickly as possible, it passed through many tests in clinical trials to meet the internationally agreed safety and efficacy benchmarks.

Which of the covid-19 vaccines is best for me?

All WHO-approved vaccines have been proven to be very effective in protecting you from being severely affected by covid-19.

After a year of the pandemic, several companies around the world have been able to produce several vaccines using different technologies.:

Comparison of types of Corona vaccines

Coronavirus vaccines are similar in that they aim to stimulate the immune system to recognize certain parts of covid-19. And to give the immune system an opportunity to recognize these parts and prevent severe symptoms of the virus.

There are many differences in the characteristics of these vaccines, here is a comparison of the types of coronavirus vaccines. We will be listing the differences between the vacancies based on the used technique that produce the vaccine as follows.

Full virus vaccine-based technique

This technique is used in many vaccines around the world, such as the measles vaccine.

The whole virus technique is based on making a vaccine that contains certain parts of the virus or a complete version of the virus or parts of the virus itself.

Examples of this technique are the Sinopharm and the Sinovac vaccines (Chinese origin), based on the use of a disabled version of the covid-19 virus:

Sinopharm vaccine

This vaccine does not need a high degree of storage, at a temperature of 2 – 8 ° C. The injunction of the vaccine is in the form of two doses. The second dose is 21 days after the first dose.

Although there are no official reports of the effectiveness of this vaccine, some reports indicate an efficacy ranging from 79% to 86%.

Sinovac vaccine

This vaccine storage temperature of 2-8 ° C. But in two doses, 14 days separating the first and second doses.

There are no detailed reports on the effectiveness of this vaccine.

DNA vaccine-based technique

When the body is injected with this vaccine, the modified genetic material of the virus enters some cells of the body. Stimulating them to produce proteins on the surface of the cell. Where the stimulated cells of the immune system are prepared to attack these cells, thus recognizing these parts in case of exposure to coronavirus.

This technology is relatively easy to manufacture but requires extremely cold grades for storage and transportation.

Examples of this technique include:

Pfizer – BioNTech vaccine

Pfizer’s American-German vaccine is the first used. While people aged 16+ take Pfizer’s vaccine, in two doses 21 days apart.

This vaccine needs a low storage grade of 60-80 ° C below zero and between 2-8 ° C for only 5 days.


The used technology production of the American Moderna vaccine is the same of the Pfizer vaccine.

It is characterized by tolerating higher temperatures during storage and distribution. It requires a temperature of 15 – 25 ° C below zero, or 2 – 8 ° C Celsius for a month.

People aged 18+take the Moderna vaccine in the form of two doses, 28 days apart.

Vaccine viral vector-based technique

This method is based on the use of a genetically modified, inactivated vector virus, which carries the genetic code of the covid-19 virus As it’s responsible to produce a certain type of virus proteins, for the body’s cells to produce them in large quantities, to stimulate the immune system response to them and thus identify them and resist

The highlights of vaccines produced with this technology:

Johnson & Johnson

The US Janssen vaccine is given to people aged 18+ in a single dose.

The storage of this vaccine at a higher temperature makes it easier to transport. Therefore, storing at 20 ° C below zero or 2-8 ° C for 3 months.


The AstraZeneca-oxfords vaccine is a British-origin vaccine given to people aged 18+ in the form of two doses, 28 days apart. This vaccine can be stored and transported within temperatures of 2-8 ° C for 6 months.

Despite concerns that this vaccine causes blood clots in some people, there’s no actual proof, and therefore still used as an effective vaccine.

Sputnik V

The Russian Sputnik vaccine is a newly produced vaccine, administered in two doses 21 days apart, with promising results, and used in several countries around the world.

Side effects associated with various Corona vaccines

  • Fatigue in the body.
  • Pain in various muscles of the body.
  • Pain, swelling.
  • Headache.
  • A slight rise in temperature, chills.

Although the techniques used to produce Corona vaccines vary, the side effects associated with these vaccines are similar and generally minor. Usually disappearing within a day or two after vaccination.


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