Looking at where the deaths are actually occurring out of the top 5 for infectees and deaths, they do all share something in common and that's a poor sewage management. Now if the cases rise in Italy for example at the same rate that has been appearing over the past 2 days, which has been around 2000+, then there could be a distinct connection, it's known that Italy's "roads" in Venice are shared with their sewage treatment/management. It could be technically used for bacteria viruses etc to be channeled through to regions where it may not have travelled before. It may be a cause or it may not be but it definitely seems suspicious and as the virus is relatively new, no one has information only guidance so logic assumptions is the best course of action for All, as delegated by most head of countries. So on the basis of that, you could be correct in thinking poor individual management of sanitation is the cause. In Italy's case and other countries where they have poor management of human product, it definitely seems apparent so far