It is not true that adults need just Flu vaccine. The DPT vaccine is recommended for pregnant women and for all adults who have not taken it previously. Similarly, Tetanus vaccine is recommended once every 10 years. The HPV vaccine should be taken by women of age 26 years or younger and men of age 21 years or younger. The Chicken Pox vaccine is recommended for all adults who never had chicken pox or never received chicken pox vaccination during childhood.
Dr Belliappa has busted some common myths regarding adult vaccination. A must read..