By a journey to Cambodia on 1 to 5 months recommend protection against the following infections:
Diphtheria Diphtheria is a serious throat infection, which infects from person-to-person through the air. The vaccination should be less than 10 years old otherwise a booster is needed. Read more about diphteria here.
Hepatitis A (infectious hepatitis) Infectious hepatitis infects through contaminated food and water. Vaccination consists of two injections about 12 months apart, which protects for up to 25 years. The first vaccination protects for 12 months. Read more about hepatitis A here. The hepatitis A vaccine can be combined with the vaccine against hepatitis B
Hepatitis B Hepatitis B infects through blood, sexual activities and, in small children, through saliva. The vaccination consists of 2 vaccinations about 4 weeks apart and a third 6 months later. The protection is for at least 25 years perhaps life long. Read more about hepatitis B here. The hepatitis B vaccine can be combined with the vaccine against hepatitis A.
Rabies The vaccination consists of 3 injections at day 0, 7 and 28 and must therefore start 4 weeks before departure. Vaccination protects for 5 years. If exposed to rabies, the "post-exposure" vaccinations are reduced from five to two if immunized before being bitten with 3 injections. Read more about rabies here.
Tetanus Tetanus is a complication to wounds contaminated by soil. If there has been a vaccination within the past 10 years it is not necessary to give a booster in case of wounds and accidents. Tetanus vaccinations are usually given in combination with diphtheria vaccine. If you are previously vaccinated, the vaccine can be given right up to departure.
Japanese encephalitis is caused by a virus spread by mosquitoes. Vaccination consists of 3 injections with 2 weeks apart and protects for up to 2 years. Vaccination should start 4 weeks before departure. Travellers, whose visits are restricted to major urban areas, are at lower risk for acquiring JE and generally should not be advised to be vaccinated. Read more about japanese encephalitis here.
Yellow fever - transit Certain countries without yellow fever require a valid yellow fever vaccination certificate if you arrives (even in transit) from a country where yellow fever is present.
If you arrive from a country without yellow fever, there is no requirement for a yellow fever vaccination.
Malaria in Cambodia The risk of malaria in Cambodia is seen on the map below. The risk is low for a short visit to Angor Vat. There is strong resistance against Chloroquine and Lariam and the choice is between Malarone and Doxycycline. Protection against mosquito bites will reduce the risk further. The distribution of malaria can be seen at the map below. Read more about malaria here.