Nowadays it has unfortunately become fashionable to condemn anything to do with chemistry and chemicals. This however should under no circumstances whatsoever lead to not having the (vitally) necessary vaccinations. With regard to the individual vaccinations the following statements can be made:
Tetanus:
If you had your last vaccination longer than 8-10 years ago, then as a rule you should have a booster.
Cholera:
The vaccination which was given until to now is not recommended anymore, yet in some countries it is still compulsory. An improved oral vaccination can be obtained from Switzerland (Orochal Berna).

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Poliomyelitis /POLIO:
If 8-10 years have elapsed since the last vaccination, then a booster is recommended. The previous oral vaccination is nowadays replaced by an injection.

Vaccinations

Further information about:
Malaria prophylaxis
Medicine
First aid kit