The new US travel precautions are based on consultations with public health experts and international partners, officials said. They said the talks have been prompted in part by concerns over the lack of genomic sequencing data that could help identify the emergence of a new variant.
Health experts have said they’re worried that the virus’s unabated spread could spawn a dangerous new variant for the first time since the omicron strain caused infections to surge more than a year ago.
GISAID, the global consortium that maintains a database for scientists around the world to share coronavirus sequences to monitor mutations, said on Tuesday that China has ramped up its surveillance amid the ongoing outbreak. All the sequences shared by the Chinese health authorities suggest the viruses fueling the massive nationwide outbreak closely resemble the circulating variants found in the rest of the world since July, they added.