Although there are no special vaccination requirements for visitors entering Israel it’s a good idea to make sure you’re up to date with your routine vaccinations: Influenza if you’re at risk, chickenpox, polio, measles/mumps/rubella for children and diphtheria/pertussis/tetanus (DPT). You don’t have to get vaccinations for malaria or yellow fever, but there is a chance your doctor may give you injections against typhoid and hepatitis. Note that although childhood diseases such as measles rarely occur in Europe and the United States they are still common in many parts of the world. To have the most benefit, see a health-care provider at least 4–6 weeks before your trip to allow time for your vaccines to take effect. It is advisable to see a health-care professional who specializes in Travel Medicine. If you have a particular medical condition make sure your doctor is aware that you're travelling. As a long-term traveller you may also need additional vaccinations as required by your Israeli employer or school.
It will be good to have sun block and sunglasses with you since the sun is intense in Israel. To prevent insect/mosquito bites, bring lightweight long-sleeved shirts, long trousers, and a hat to wear outside as well as insect repellent.. In the summer months light shoes, sandals and walking shoes will be needed, bring a swimsuit and beachwear, and a light coat, jacket or sweater will be useful since it cools off in the evenings. In the winter, November-March, sweaters and a raincoat will be needed.
If you’re planning an active trip to Israel it would be good to get in shape with an exercise routine some months before your trip (unless you’re already into sports and fitness of course). Terrain in Israel is rugged and visiting historical sites involves a lot of steps. Invest in travel insurance (see the appropriate section on Health). If you’re prone to sinus headaches while flying, take decongestants, sinus headache medicines, and chewing gum, and avoid caffeine and alcohol and drink plenty of fluids during the flight. If you’re planning an organised tour aim to arrive a day ahead so you can be fully rested.