New research focuses on cow's milk as a possible source of COVID-19 control Physiologically, milk contains biocomponents that are highly protective against infections. In light of this, the AGR-149-Infectious Diseases group at the University of Cordoba's Department of Animal Health is doing research that focuses on cow's milk as a possible source of Covid-19 control. The results have been published, partially, in the journal Frontiers in Immunolog y. This is possible due to "crossed immunity", and there is already evidence of the protection it provides, explained one of the principal investigators, Mari Carmen Borge. It has been shown that the immune cells that the vaccinated animal generates against bovine coronavirus are capable of controlling other coronaviruses as well, such as SARS-CoV-2, which causes Covid-19".