This article was published more than 2 years agoGift ShareSAN DIEGO — The asylum seeker from Cameroon exited the van that had taken him from federal immigration detention to a bus station in the California border city of Calexico. Volunteers were waiting to pick him up, drive him to a hotel and help him book a plane ticket to join a sister living in Michigan. But the man held up his hands instead."Stand back," he said, disclosing that he had been diagnosed with covid-19.The next day, advocates for immigrants said, it happened again when Immigration and Customs Enforcement dropped off a...…This article was published more than 2 years agoGift ShareSAN DIEGO — The asylum seeker from Cameroon exited the van that had taken him from federal immigration detention to a bus station in the California border city of Calexico. Volunteers were waiting to pick him up, drive him to a hotel and help him book a plane ticket to join a sister living in Michigan. But the man held up his hands instead."Stand back," he said, disclosing that he had been diagnosed with covid-19.The next day, advocates for immigrants said, it happened again when Immigration and Customs Enforcement dropped off a...WW…