Oliver Doyle/File Photo/Reuters Bird flu could be a pandemic “unfolding in slow motion,” scientists warned, as gaps in surveillance leave them unable to monitor its progress. The virus has now been detected in 129 dairy herds in the US, as well as dozens of other mammal species, and epidemiologists are concerned that it will soon be transmissible between humans. “Right now, the threat is pretty low,” one researcher told Reuters, “but that could change in a heartbeat.” Cows are only tested as they cross state lines, and testing of humans exposed to cattle is “very, very limited,” according to another researcher. Early warning of a jump to humans could allow health officials to boost vaccine development and containment measures. |