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 the first two weeks of the effort, which began in late October, 84 million boys and girls between the ages of 3 and 11, about half of the eligible population, received the first of two shots, accordin …
