Do I really need to get a COVID-19 booster? CDC real-world study confirms effectiveness Austin American-StatesmanOpinion | New studies show a booster dose is essential. Our policies should change accordingly. The Washington PostLower risk of vaccine-breakthrough infections for mRNA-1273 recipients News-Medical.NetCDC study: booster shot needed to protect against omicron The Indianapolis StarFirst US booster data shows 3rd dose crucial against Omicron New Atlas