When you go to a travel medicine doctor, your wallet will be shocked at the cost. But what is smart and what is excess? We non-medical people are usually scared into getting every shot possible, but first be aware of the following:
Innoculations should be based on the climate of your destination: dry season does not require some shots which are critical in the wet season.
Exactly where you are going versus large swathes of country. For instance, India where our group is going in October: this is a huge country and what is needed for Delhi is not the same for the Himalayan plateau or the agrarian south.
What you will be doing is important? Walking? Riding animals? In enclosed areas like temples built from caves?
We recommend you do research before going to the doctor, even bring a map of your destination to show him/her. And check with the CDC, try to speak with someone there not just print out a list of medicines.
As important as pills and shots, bring Purell or something like it, wash hands more frequently than you even think you need and then dribble on the Purell as a finisher. Brush teeth and clean face with bottled water. Close mouth in the shower and do not drink directly from bottles. (Some like to bring straws to avoid this).
Resources for Travel Medicine are here and for Travel Insurance are here:
Walgreens Travel Health Consultations ( check on line for which stores have this wonderful new service)
Many states have their own Center for Disease Control
Some port areas have travel clinics like Seattle, Ft Lauderdale etc.
If you plan on being in London, you will find even travel agencies like Trailfinders have travel medicine clinics on premises and prices are much lower.