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Read on to learn what boosters are available, how vaccine distribution is changing and get answers to questions about the safety of these immunizations. Editor's Note As we've seen, information about the pandemic has been changing since the beginning of the year—and the latest vaccines are no exception. as up-to-date as possible, be sure to check the CDC website for the latest news.

Want to know how vaccines are developed We cover this in How croatia whatsapp list 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 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 one worthy of attention.