It is known that a new variant of the coronavirus, Omicron, emerged and is widespread in South Africa and other countries. In its home country, it is reported that this variant affects people 40 years of age or younger and nearly half of symptomatic patients are not vaccinated.
There are various types of vaccines that have been approved by WHO, including Pfizer/BioNTech, Oxford-AstraZeneca, Johnson & Johnson's Janssen, Moderna, and Sinovac-CoronaVac, all of which have been proven safe and effective for use. The COVID-19 vaccine usually carries a weakened disease agent so the immune system learns by building a memory of the virus. That way, the body can quickly recognize the COVID-19 virus and fight it before it causes severe symptoms.
With regard to new virus variants such as Omicron, the vaccines that have so far been approved for use are expected to provide at least some protection against the new variant. Experts are also continuing to study the impact of the new variant on the behavior of the virus, including its potential impact on the effectiveness of the COVID-19 vaccine. If the current vaccines prove to be ineffective against one or more new variants, the composition of the vaccine content may be changed to increase its protective effect or changes to the vaccination are required, such as booster doses or other updates.
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