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A comparison between the types of corona vaccines

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 A comparison between the types of corona vaccines

The production of vaccines against the Coronavirus gave a ray of hope for the return of life to its course in the world, and to get to know these vaccines better to you, as follows a comparison between the types of Corona vaccines:


A comparison between the types of corona vaccines


After more than a year has passed since the Corona pandemic, several companies around the world have been able to produce several vaccines for the Covid-19 virus (Covid-19) using different technologies. Here comes a comparison between the types of corona vaccines, and the most prominent differences between them:


A comparison between the types of corona vaccines

After several scientists around the world have produced effective vaccines for the Covid 19 virus, there is hope for a return to normal life, relieving pressure on health systems, and reducing the number of deaths resulting from this virus.


Corona vaccines produced are similar in that they aim to stimulate the immune system to identify specific parts of the Covid 19 virus and allow the immune system to recognize these parts and prevent the virus's severe symptoms.

Among the most important goals of vaccines of all kinds is to vaccinate the largest number of people worldwide and produce community immunity against the Coronavirus.


Although giving different vaccines has one result, there are many differences in the characteristics of these vaccines. Here is a comparison between the types of Corona vaccines, and the most prominent examples are:


The complete virus vaccine

This technology has been used in many vaccines used around the world, such as the measles vaccine, and the complete virus technology depends on making a vaccine that contains specific parts of the virus or a complete copy of the virus, which can be divided into two parts:


  1. A vaccine that contains a weakened version of the virus (Live attenuated vaccines), which has the ability to double in number and stimulate the immune system response, but without causing symptoms of the pathogen virus.
  2. A vaccine that contains an inactivated version of the virus (Inactivated vaccines), so that it does not have the ability to double in number, but stimulates the immune system response without causing symptoms of the virus to recognize the virus if infected.


Examples of this technology are the Chinese-origin vaccines Sinopharma and Sinovac, which depend on the use of an inactivated version of the Covid 19 virus, here is the most prominent information known to date about these two vaccines:


1. Sinopharm vaccine

(Sinopharm)


This vaccine does not need a high degree of storage, as it is stored at a temperature of 2 - 8 degrees Celsius, and this vaccine is given in the form of two doses, where the second dose is given 21 days after the first dose.


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


2. Sinovac vaccine


This vaccine is stored at a temperature of 2-8 ° C, and given in two doses, 14 days apart from the first and second doses.


There are only now detailed reports on the effectiveness of this vaccine.


DNA vaccine

The technique of producing a vaccine using messenger RNA is one of the modern technologies, which depends on the use of the immune-stimulating part inside the genetic material of the modified Covid 19 virus in the laboratory.


When the body is injected with this vaccine, it causes the modified genetic material of the virus to enter some cells of the body, and stimulate them to produce proteins on the surface of the cell, so that the cells of the immune system are stimulated to attack these cells, and thus identify these parts in the event of exposure to the Coronavirus.


Despite the use of a technique based on the genetic material of the virus, it does not enter the cell nucleus, and therefore it cannot interfere or affect the genetic material of the human being.


This technology is relatively easy to manufacture, but it needs very cold temperatures for storage and transportation, which may make it a hindrance during the distribution process to countries and pollination at large levels.


Some of the most prominent examples of this technology include:


1. The Pfizer-BioNTech vaccine


The German-American Pfizer vaccine is the first vaccine that has been used, and the Pfizer vaccine is given to people 16 years of age and older, in two doses, separated by 21 days.


This vaccine needs a low storage temperature ranging between minus 60-80 degrees Celsius, and between 2-8 degrees Celsius for 5 days only.


2. Moderna


The American Moderna vaccine is produced using the same technology used to produce the Pfizer vaccine, but it is characterized by tolerance of higher temperatures during storage and distribution, as it needs a temperature of 15-25 degrees Celsius below zero, or 2-8 degrees Celsius for a month.


The Moderna vaccine is given to people 18 years of age and over and is given as two doses 28 days apart.


Viral carrier vaccine


This method is based on the use of a disrupted and genetically modified vector virus, so that it carries the genetic code for the Covid 19 virus that is responsible for producing a specific type of surface virus protein, so that the cells of the body produce them in large quantities, to stimulate the response of the immune system to it and thus identifying and resisting it in the event of infection with the Coronavirus.


Here are the most prominent vaccines produced with this technology:


1. Johnson & Johnson


The US Janssen vaccine is given to people 18 years of age and older with one dose, and a second dose is currently being studied two months after the first dose.


This vaccine is characterized by its storage at a higher temperature, which is easy to transport, as it is stored at minus 20 degrees Celsius, or 2-8 degrees Celsius, for 3 months.


2. Oxford-AstraZeneca


The AstraZeneca-Oxford vaccine of British origin is one of the vaccines that have been approved for use recently, and it is given to people 18 years of age and older in the form of two doses, 28 days apart.


This vaccine is characterized by the ability to store and transport it at refrigerated temperatures from 2-8 degrees Celsius for a period of 6 months.


Despite concerns that this vaccine may cause blood clots in some people, it has not been proven that the vaccine causes this, and therefore it is still used as an effective vaccine now.


3. Sputnik V


The Sputnik vaccine in Russia is one of the modern production vaccines, which is given in two doses, 21 days apart, and is promising results and has started to be used in some countries around the world.


The side effects associated with the various Corona vaccines


Despite the different techniques used to produce Corona vaccines, the side effects associated with these vaccines are similar and are generally slight symptoms, and they usually disappear within a day or two after vaccination and include the following symptoms:


  • General fatigue in the body.
  • Pain in various muscles of the body.
  • Pain, swelling, and redness where the vaccine was given.
  • a headache.
  • Slight fever and chills.
  • The vaccine may cause an allergic reaction (anaphylaxis) in some rare cases, the symptoms of which appear immediately after receiving the vaccine.

Are Corona vaccines safe to use?


Vaccines are one of the best and most successful ways to prevent many infectious diseases, including the emerging coronavirus, so it is advised to take the vaccine as soon as you get the opportunity to receive it, to protect yourself and those around you from contracting the virus and exposure to its severe symptoms, and working to achieve community immunity to end this epidemic shortly.


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