Copyright © 2022, Los Angeles Times | | | | Advertisement Since a novel coronavirus first made its presence known in China, public health officials around the world have had one fervent hope: That people who are infected but not sick would pass the virus to others only rarely. That would give these silent spreaders no more than a bit part in driving a global outbreak.That hope is in danger of being dashed.In the period before the Chinese government threw up a massive barricade around the province of Hubei to block the coronavirus’ escape, almost 9 out of 10 infections were transmitted by...…Copyright © 2022, Los Angeles Times | | | | Advertisement Since a novel coronavirus first made its presence known in China, public health officials around the world have had one fervent hope: That people who are infected but not sick would pass the virus to others only rarely. That would give these silent spreaders no more than a bit part in driving a global outbreak.That hope is in danger of being dashed.In the period before the Chinese government threw up a massive barricade around the province of Hubei to block the coronavirus’ escape, almost 9 out of 10 infections were transmitted by...WW…