Humans, common household pets and farm animals can theoretically mutually infect each other with SARS-CoV-2 and develop the COVID-19 pathology
The SARS-CoV-2 pandemic is spreading fast throughout the world, and often the new cases are reported as community spread, which means that it is not possible to identify a specific cause for contagion. Household pets and farm animals live closely to humans and even if currently there is no empirical evidence of animal to human transmission, it has not been reported yet if transmission is in principle possible. This work addresses such hypothesis, confirming that transmission is theoretically possible, and highly likely to occur between humans and mammals. Less likely or not likely at all between humans and birds. Further research is needed to validate the birds to humans transmission. -- THIS ARTICLE IS CURRENTLY BEING EXPANDED AND REVISED --