Jeev 3mcg Vaccine is a medicine used for prevention of Japanese encephalitis (JE). It protects against JE and is given as part of universal immunization program for selected places endemic to JE. Your doctor will decide if you should receive Jeev 3mcg Vaccine based on your situation. It is given as a subcutaneous injection. The primary vaccination may be given to children between 1 years to 3 years of age. Adults can receive the same at or after 18 years upto 49 years of age. The vaccine is recommended for people moving to a Japanese encephalitis (JE)-endemic country, travelers who plan to stay for more than 1 month in JE-endemic areas, and frequent travelers to JE-endemic areas. This vaccine should also be considered for shorter-term (less than 1 month) travelers with an increased risk of JE. Common side effects of this medicine include injection site reactions (such as soreness, swelling, pain, or redness), headache, fever, muscle pain, nausea, and fatigue. Let your doctor know if any of these side effects persist or get worse. They may be able to suggest ways to reduce or manage the side effecrs. Before receiving the vaccine, you should let your doctor if you have ever had an allergic reaction to a vaccine. Also tell your doctor if you have any problems with your heart, kidneys, or liver. Some other medicines may react with this vaccine, let your doctor know of all the medication you are taking. Pregnant or breastfeeding should consult their doctors first before receiving this vaccine.