Institute of Otolaryngology named after prof. O.S. Kolomiychenko NAMS of Ukraine and Institute of Microbiology and Virology named after Zabolotny National Academy of Sciences of Ukraine conducted an experimental study of bioproducts provided by Diaprof-Med for immunization of animals by the intranasal route
http://microbiolj.org.ua/en/archiv/2021-tom-83/5-sep-oct-tom-83/2021-83-5-10