He’s utterly convinced the virus came through from the past.” Mary sighed. “He’s drawn up charts of the cyclical mutation patterns of Type A myxoviruses. According to them, one of the Type A myxoviruses extant in 1318–19 was an H9N2.” She rubbed at her forehead again. “He won’t open the laboratory until full immunization’s been completed and the quarantine’s lifted.” “And when will that be?” he asked, though he had a good idea. “The quarantine has to remain in effect until seven days after full immunization or fourteen days after final incidence,” she said as if she were giving him bad news.
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