| http://www.w3.org/ns/prov#value | - h the microbes weren???t known yet.He had observed, in fact, that the illness was transmitted both for direct contact among people (contactu), that through objects, as it happens for example with the garments (fomites), both to distance as in the case of the smallpox and the plague.In this work Gracastoro wrote: it seems that three different types of contagion exist.
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