A virus presently located in a remote rain forest could, by means of air travel, be in a major city by this time tomorrow. We now live in such crowded cities that the scope for transmission of a virus which travels through air is greater than ever befo
A virus presently located in a remote rain forest could, by means of air travel, be in a major city by this time tomorrow. We now live in such crowded cities that the scope for transmission of a virus which travels through air is greater than ever before.
