Sinovac Booster Gives Elderly Stronger Protection Against Omicron, Study Finds

Two doses of China’s Sinovac vaccine offered older people only a moderately high level of protection against severe disease and death from Covid-19, but a third dose significantly bolstered their defenses, according to a new study by scientists in Hong Kong. The study, based on patients infected during the current devastating Omicron wave in Hong Kong, serves as a cautionary note for mainland China, where Sinovac is a pillar of the country’s vaccination program. Many older people there have yet to receive booster shots. For people 60 and older, two…

Most of the World’s Vaccines Likely Won’t Prevent Infection From Omicron

A growing body of preliminary research suggests the Covid vaccines used in most of the world offer almost no defense against becoming infected by the highly contagious Omicron variant. All vaccines still seem to provide a significant degree of protection against serious illness from Omicron, which is the most crucial goal. But only the Pfizer and Moderna shots, when reinforced by a booster, appear to have initial success at stopping infections, and these vaccines are unavailable in most of the world. The other shots — including those from AstraZeneca, Johnson…

Most of the World’s Vaccines Likely Won’t Prevent Infection From Omicron

A growing body of preliminary research suggests the Covid vaccines used in most of the world offer almost no defense against becoming infected by the highly contagious Omicron variant. All vaccines still seem to provide a significant degree of protection against serious illness from Omicron, which is the most crucial goal. But only the Pfizer and Moderna shots, when reinforced by a booster, appear to have initial success at stopping infections, and these vaccines are unavailable in most of the world. The other shots — including those from AstraZeneca, Johnson…

China Calls on ‘Little Inoculated Warriors’ in Its War on Covid-19

As the rest of the world struggles to vaccinate adults in the face of a threat from a new coronavirus variant, China has embarked on an ambitious campaign that it says will give the country better protection against Covid-19: full inoculation of 160 million of its youngest citizens by the end of the year. The campaign — powered in part with red flower stickers, balloons and boxes of toys for children who step up to become what nurses call “little inoculated warriors”— has gotten off to a fast start. In…