Obtain proper medical advice before you go - visit the Department of Health website at health.gov.au
for all the latest updates. Your local doctor will be able to help you with vaccination advice for the particular countries you’re visiting. Make sure you take these steps well in advance to travelling. Many vaccinations require repeat doses, and/or take time to take effect. Make sure you have letter from your doctor for any medications you are carrying, each country has their own rules on pharmaceuticals.