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Many Americans have already received their second dose of the vaccine or those who have chosen the vaccine have received a single dose. Vaccination appears to be the key to throwing away masks and concerns. surged and came to the United States at the end of the year, the concept of "breakthrough cases" came with it. Health experts have struggled to correct expectations that vaccines should prevent all symptoms and not just severe disease hospitalizations and death as variants manage to evade vaccine-induced immunity. Now a new booster shot designed specifically to target the strain is available, which scientists hope will better protect recipients against current dominant variants and future variants.

Tracking available vaccines and when you should sign up for business owner database your next appointment can be overwhelming but we have you covered. 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. While we aim to keep our articles 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 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.