Routinely given between 12-18 months. 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 immunization, a booster in six to twelve months is recommended for long-term protection.
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.