Flu Jab
Influenza is usually a more severe illness than the common cold and typically has a sudden onset with headache, chills and cough followed rapidly by a fever, appetite loss, muscle aches, and tiredness. Thankfully, the influenza vaccination can offer some protection against the virus.
After vaccination, the body’s immune system produces antibodies against the inactivated virus in the vaccine. If you are exposed to the real virus, the antibodies prevent the infection or reduce the likelihood of severe illness should infection occur. The Ministry Of Health recommends that travellers, both adults and children above six months, going to temperate countries in the Northern Hemisphere protect themselves against the disease with influenza vaccination.
Children who have chronic disorders of the lungs or heart or who require regular medical follow-up or hospitalisation because of chronic metabolic diseases, kidney or blood disorders are advised to be vaccinated against influenza as well.
Quoted from
http://www.motherhood.com.sg/baby_health/