Blood tests are an easy, safe, and relatively inexpensive way to peer inside your pets and find potential health problems. Analysis of the numbers and structure of blood cells is important in the diagnosis and monitoring of disease and infection. These tests can help us identify a problem before clinical signs or symptoms appear. But what exactly are we looking for when we do a blood draw on dogs and cats?

When the current outbreak of novel coronavirus disease, or COVID-19, first came to light in December 2019, researchers indicated that animals were the likely source of the virus. So people are naturally asking, "Can my pet contract and transmit this virus?" That question has become even more valid after one dog - the pet of an infected owner in Hong Kong - recently tested "weak positive" for the virus.