Why Vaccinations May Fail
I’m a big fan of vaccinating pets. Immunization has successfully prevented disease in millions of pets for years. But once in a while, a vaccine doesn’t work for a particular animal. Vaccine failure is pretty rare, but it can happen. Here are a few reasons why: Different strains of the same disease. Most of the time, the strain of a disease used in a vaccine protects your pet against other strains of the same disease. Sometimes, a new strain evolves that is resistant to the vaccine. (Drug-resistant diseases are a problem for humans, too.) The vaccine was spoiled. Many vaccines … Continue reading