Will I be allowed to enter Australia from Brazil if I do not have a yellow fever vaccination certificate?

Upon arriving back into Australia, you may be asked by border control to provide a valid vaccination certificate as proof that you have received the yellow fever vaccination. 

If you do happen to return to Australia without a valid certificate, you will still be permitted entry. At immigration, a biosecurity officer from the Department of Agriculture & Water Resources will reinforce the serious nature of the disease. They will then provide you with a Yellow Fever Action Card, which provides instructions on what to do if you develop any symptoms of yellow fever in the 6-day period after you left Brazil. If you are travelling from Brazil to a country other than Australia, please note that the country you are travelling to may require a yellow fever vaccination certificate and if you do not have it, it may be that you are refused entry or require vaccination on entry.