Purpose: package tour, business, missionary, backpacking? Exposure to health risk varies with different travel style.
Hygiene standard of destination.
Special activities: high altitude trekking, diving, hunting, camping, etc.
If you have any medical problems, you have to discuss with your family doctor before travel.
Medications that need to be taken regularly should be carried as hand baggage.
Make a record of the medicines you are using.
Check with your family doctor or the Travel Health Centres of the Department of Health for the types of vaccines required. These may include vaccination against hepatitis A and B, yellow fever (required under the International Health Regulations if you visit certain countries in Africa and South America), typhoid fever, etc.
If you need vaccination, tell the doctor about any allergies you may have before receiving the vaccine.