Always follow expert advice to protect the health of your pets, particularly regarding routine vaccinations, worming and external parasite, particularly flea, control.
If your pet does become sick, there are actions you can take to prevent spread of disease.
Guidance
Federation of European Companion Animal Veterinary Association (FECAVA) provide guidance, FECAVA Advice to Companion Animal Owners on Responsible Use of Antibiotics and Infection Control in conjunction with The Bella Moss Foundation, a charity which works in collaboration with the British Veterinary Association and veterinary schools, provides information and guidance on infection control.