Health

Learn about COVID-19 vaccines.

After a number of 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.

After more than a year has passed since the Corona pandemic, a number of 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 of the types of corona vaccines.

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

Among the most important goals of vaccines of all kinds is to vaccinate the largest number of people around the world and to produce community immunity against the Corona virus.

1. Sinopharma and Sinovac.

vaccines of Chinese origin, 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:

▪️ Sinopharm vaccine.

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 the effectiveness of this vaccine, there are some reports that indicate effectiveness ranging from 79% to 86%.

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

2. Pfizer-BioNTech and Moderna.

The vaccine uses a production technique using messenger RNA.

▪️ 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.

▪️ Moderna.

The American Moderna vaccine is produced using the same technology used to produce the Pfizer vaccine, but it is characterized by enduring 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.

3. Johnson & Johnson, Oxford-AstraZeneca, and Sputnik at Sputnik V.

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, with the aim of stimulating the response of the immune system to it and thus identifying and resisting it in the event of infection with the Coronavirus .

▪️ 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 a period of 3 months.

▪️ 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 to 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 until now.

▪️ 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 a number of countries around the world.

What are the possible side effects of a COVID-19 vaccine?

A COVID-19 vaccine can cause mild side effects after the first or second dose, including:

▪️ Pain, redness or swelling where the shot was.

▪️ given.

▪️ Fever.

▪️ Fatigue.

▪️ Headache.

▪️ Muscle pain.

▪️ Chills.

▪️ Joint pain.

▪️ Nausea and vomiting.

▪️ Feeling unwell.

▪️ Swollen lymph nodes.

You’ll likely be monitored for 15 minutes after getting a COVID-19 vaccine to see if you have an immediate reaction. Most side effects happen within the first three days after vaccination and typically last only one to two days.

Serious side effects of the Janssen/Johnson & Johnson COVID-19 vaccine can occur within three weeks of vaccination and require emergency care.

Possible symptoms include:

▪️ Shortness of breath.

▪️ Persistent stomach pain.

▪️ Severe or persistent headaches or blurred vision.

▪️ Chest pain.

▪️ Leg swelling.

▪️ Easy bruising or tiny red spots on the skin beyond the injection site.

A COVID-19 vaccine may cause side effects similar to signs and symptoms of COVID-19. If you’ve been exposed to COVID-19 and you develop symptoms more than three days after getting vaccinated or the symptoms last more than two days, self-isolate and get tested.

What are the signs of an allergic reaction to a COVID-19 vaccine?

You might be having an allergic reaction to a COVID-19 vaccine if you experience these signs within four hours of your first vaccine dose:

▪️ Continuous shortness of breath or wheezing.

▪️ Swelling of the lips, eyes or tongue.

▪️ Redness, swelling or itchiness in areas of the body other than the limb in which the vaccine was given.

If you have any signs of an allergic reaction, get help right away. Tell your doctor about your reaction, even if it went away on its own or you didn’t get emergency care. This reaction might mean you are allergic to the vaccine. You might not be able to get a second dose of the same vaccine. However, you might be able to get a different vaccine for your second dose.

Is it OK to take an over-the-counter pain medication before or after getting a COVID-19 vaccine?

It isn’t recommended that you take a pain medication before getting a COVID-19 vaccine to prevent possible discomfort. It’s not clear how these medications might impact the effectiveness of the vaccines. However, it’s OK to take this kind of medication after getting a COVID-19 vaccine, as long as you have no other medical reason that would prevent you from taking it.

References :

مقارنة بين أنواع لقاحات الكورونا/ www.webteb.com

https://www.mayoclinic.org/diseases-conditions/coronavirus/in-depth/coronavirus-vaccine/art-20484859

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