Controversy rises over booster shot for Janssen vaccine
A man receives a Janssen coronavirus vaccine at a medical clinic in South Gyeongsang Province, June 10. YonhapBy Lee Hyo-jin Controversy is rising over the administration of booster shots for recipients of Johnson & Johnson's Janssen COVID-19 vaccine, as they have reported the largest number of breakthrough infections among fully vaccinated people. While some medical experts believe the government should immediately offer additional shots to the group, others advise that the plan should undergo a more prudent review.President Moon Jae-in ordered the health authorities Monday to swiftly come up with a plan to administer booster shots for people who received the single-dose regimen Janssen vaccine, as a recent study in the U.S. suggested that its protection drastically weakens after five months. According to the study which examined the vaccine's efficacy among 620,000 discharged service members in the U.S., the prevention rate plunged to 3 percent in August, from 88 percent in March. On Oct. 15, the U.S. Food and Drug Administration's (FDA) expert panel recommended a booster dose
