Also adults without a reliable history of having had chickenpox. Flu occurs throughout the year in the tropics and during December to April in the northern hemisphere. For all travelers. After primary dose, a booster in six to twelve months recommended to complete the series for long-term protection. For all health care personnel, those dwelling over six months, if intimate contact with the people is anticipated, or if emergency health care facilities are substandard.
Full immunization requires three injections over six months.
No vaccine is available. Mosquito netting and repellents are recommended for use. Booster every five years. Booster every two years. Booster every three years.