They were unaware at the time that the Plague was spread by fleas, that had fed on a rodent carrier. If they'd had that knowledge, they would have infected many more, but as it was, the powder on the doorknobs, etc., was not an effective means of infection..
They were unaware at the time that the Plague was spread by fleas, that had fed on a rodent carrier. If they'd had that knowledge, they would have infected many more, but as it was, the powder on the doorknobs, etc., was not an effective means of infection..
They were unaware at the time that the Plague was spread by fleas, that had fed on a rodent carrier. If they'd had that knowledge, they would have infected many more, but as it was, the powder on the doorknobs, etc., was not an effective means of infection..