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Want to know how vaccines are developed We cover this in How vaccines are developed Experts explain why variants are not surprising Viruses like this are known to mutate frequently. Many mutations do not have a significant impact on the virus's ability to spread or the severity of disease it causes. The World Health Organization classifies a mutation as a "mutant of interest" when it causes a significant change in the way the virus behaves. Variants of interest are classified as "variants of concern" when they begin to circulate widely and lead to more breakthrough cases or reduce the effectiveness of public health measures.

More contagious variants will undoubtedly lead to more nepal whatsapp list hospitalizations and put a strain on the health care system. Image courtesy of Los Angeles Times Getty Images At the time of this writing, the variant, including its many sub-variants, is the only variant of concern and there are currently no variants of interest. Of course you can easily check yourself if things have changed via the check tracker. The rise of the variant also marks a shift in our understanding of vaccine efficacy as the variant successfully evades the vaccine and causes disease in the community even among vaccinated people.

Booster shots are now being produced to target new variants of concern. In September, the UK became the first country to approve a variant-specific "bivalent" booster shot. The vaccines, known as "bivalent" vaccines, mix a vaccine formula against the original virus with a new formula specifically designed to fight infections caused by the variants. As the virus evolves it looks less and less like the original virus. By developing vaccines that target more evolved variants, it is hoped that these vaccines will also protect against future variants that may be more similar to the new variants than the original virus.