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Covid update: Why are booster shots important?
08:40 - Source: CNN
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BARTLETT, ILLINOIS - MAY 01: Seven-year-old Hamza Haqqani, a 2nd grade student at Al-Huda Academy, uses a computer to participate in an E-learning class with his teacher and classmates while at his home on May 01, 2020 in Bartlett, Illinois. Al-Huda Academy, an Islam based private school that teaches pre-school through the 6th grade students, has had to adopt an E-learning program to finish the school year after all schools in the state were forced to cancel classes in an attempt to curtail the spread of the COVID-19 pandemic. (Photo by Scott Olson/Getty Images)
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LOS ANGELES, CALIFORNIA - APRIL 21: A man is asked to cough into his arm as part of testing for COVID-19, by a member of the Los Angeles Fire Department wearing personal protective equipment (PPE) in Skid Row, amidst the coronavirus pandemic on April 21, 2020 in Los Angeles, California. 43 people tested positive for COVID-19 at one nearby Skid Row homeless shelter. (Photo by Mario Tama/Getty Images)
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CNN  — 

The US Food and Drug Administration has authorized additional booster doses of the Pfizer/BioNTech and Moderna coronavirus vaccines for adults 50 and older – and now, many people in that group are wondering whether to get that dose now or later.