This map highlights the number of reported positive cases of
Feline Immunodeficiency Virus (FIV), Feline Leukemia Virus (FeLV)
and Heartworm Disease in cats across all regions of the United States.
Because so many cats go untested for infectious diseases, the
actual number of affected cats is likely many times
higher than what is shown here.
The maps indicate recorded positives from more than 10,000
veterinary clinics and IDEXX Reference Laboratories results,
updated weekly to show data from the past five years.