Halotherapy (HT, from Greek halos=salt) uses dry aerosol microparticles of salt and, in one version, minerals to treat respiratory diseases. HT seeks to replicate the conditions of speleotherapy (from Greek speleos=cave), a treatment that has been practiced in old salt mines of Eastern Europe since the early 19th Century.
Halotherapy belongs to the category of the physical therapies–non-drug treatments of diseases, many associated with the spa treatments of Eastern Europe. In the former Soviet Union, medical researchers engaged in a concerted effort to develop physical therapies in order to avoid the costs and side effects of drug therapy as well as microbial and tumor resistance. Russia has become a world leader in developing and testing new and increasingly effective physical therapies.
Here are three overlooked methods of treating respiratory and disseminated infections that resemble the one caused by the COVID-19 virus. 
Originating in Eastern Europe,