With photos of test strips, health tips and detailed symptom diaries, China’s social media is flooded with posts about catching and surviving Covid-19 as the country learns to live with the virus for the first time. Catching Covid was long taboo in China, where recovered patients faced job discrimination and social isolation during the country’s nearly three-year effort to stamp out the virus at all costs. But just days after the country abruptly dropped strict testing and quarantine requirements, effectively ending its zero-Covid policy, catching the virus is now something many openly share. “On the third day of going back...