COVID-19 vaccine – Everything you need to know



The coronavirus is scientifically known as covid-19. It is a respiratory disease that can be fatal to patients weakened by age or another chronic disease.

When was COVID-19 discovered?

The origin of Covid -19 is still debated. It first appeared in December 2019 in the city of Wuhan, Hubei Province, China. It quickly spread first throughout China, then abroad causing a global epidemic.

The symptoms of the disease

The different symptoms of the disease are fever, fatigue and a dry cough. For some patients, pain, congestion, runny nose and sore throat are detected. There are also diarrhea and pneumonia, the most delicate of the symptoms. There are also asymptomatic cases, i.e., patients have no apparent symptoms despite the detection of the virus. People at high risk are the elderly and people with chronic diseases. But everyone can have the disease.

Ways to prevent the disease

According to the WHO, World Health Organization, to effectively prevent Covid-19, one must:

  • Frequently wash hands with soap and water or a hydroalcoholic solution
  • Avoid close contact such as hugging or shaking hands
  • Cover the mouth with the elbow when coughing or sneezing
  • Not touch eyes, nose or mouth
  • In case of respiratory symptoms and fever, wear a mask and stay indoors so as not to contaminate those around you. Call your doctor and follow his instructions.

The most effective way to prevent Covid at this time is through vaccination.

What is a COVID-19 variant?

Every virus needs a vaccine to fight it. Thus, covid-19 has not had one vaccine but several. This leads the average person to be suspicious of these vaccines. But this is quite normal because the corona virus is not like the others. It is a first in the case of viruses. This virus since its identification in early 2020 has undergone thousands of mutations. This explains the countless vaccines that have been produced. Four variants of the Sars-Cov-2 virus have attracted the attention of experts: Alpha, discovered in the UK, Beta in South Africa, Gamma in Brazil and Delta in India.

The different types of vaccines against covid-19


Out of 200 proposed vaccines, 52 have been tested on animals and about ten have been confirmed effective by the WHO to be administered to humans. We have: Pfizer, Moderna, Astra Zeneca, Johnson-Johnson, Navavax, Nanofi, CureVac, Chinese vaccine, Russian vaccine. Each country adopted the vaccine of its choice to launch its vaccination campaign.

The beginning of the year 2021 marked the launch of vaccination campaigns against covid-19 throughout the world. However, if there are more than a dozen vaccines administered, how are they different? Because of the variants, the vaccines are diversified. Each variant has its own vaccine. Many people wonder which vaccine is more effective.

How effective are these vaccines and which one is more effective ?

Vaccines are not 100% effective, but between 80 and 90%. So, after your vaccination, you are likely to be contaminated but your risk of being affected by the disease is lower. The most effective vaccine does not exist. But four are highly recommended because they are adopted as being more effective. They are: Pfizer, Moderna, Astra Zeneca and the Janssen vaccine.

With all these complexities, people do not adhere to vaccination. Also, the side effects of these vaccines, said to be fatal by some people, do not really help.

What are the side effects of vaccines?

Like any medication, a vaccine can have side effects. This is the case with Covid vaccines, which have side effects such as pain and sensitivity at the injection site, headaches and fatigue. Fever, digestive problems, vomiting, muscle pain are the most serious side effects, but not fatal.

Is vaccination compulsory ?

At the end of 2020, the first doses began to be administered in the world, more precisely in the West. The percentage of people vaccinated to date remains limited. Cause of polemics around the vaccines. In order to save the world from the pandemic, Western governments impose vaccination as the only effective way to prevent and avoid the rate of contamination against Covid.

KVaccination for a collective immunity should not be a brake for the populations since the situation requires it.

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