Immunizations are not required to visit China, but it is best to take several vaccinations before attending the 2008 Summer Olympics in Beijing from Aug. 8 to Aug. 24.

"Taking a few minutes to make sure you have the proper vaccinations will give a better chance of avoiding any dangerous medical problems when you're far from home," said Debra Amos, a travel nurse with The Methodist Hospital Wellness Services in Houston.

"There are a lot of diseases that pose a potential risk in this part of the world," Amos said, according to Medical News Today.

The three-shot Twinrix vaccination covers Hepatitis A and B infection. A typhoid vaccination is recommended to prevent infection from food.

Visitors planning outdoor activities may do well with immunization from the Japanese and tick-borne encephalitis. Immunization against rabies gives protection especially to young children.

Travelers to China may also want to check on routine vaccinations such as tetanus/diphtheria, measles, pneumococcal, polio and varicella.