Pathogens can be transmitted from animal-to-animal and across animal species. Pathogens can be transmitted from a person-to-animal and animal-to-person, causing similar diseases in the person and animal. The evidence strongly suggests infectious pathogens are a cause of many chronic diseases. The high rate of parvovirus in cancer patients is concerning. Pet dogs owned by lupus patients are at a higher risk of developing.pdf https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3362544/#__sec11title
Dogs and cats can be infected with covid19. Covid can pass from person-to-animal, and animal-to-animal; in the animals the virus can change; and then the animals can pass the same or modified forms of the pathogen back to people. During the Spanish flu pandemic, humans infected pigs with H1N1; and many decades later pigs infected humans with a similar but modified form of the H1N1 influenza virus. Pets and animals in the household and/or in close contact with people can…..