Every country has its own climate and living conditions. It can sometimes be very difficult for an unaccustomed body. Before visiting exotic countries, you should be especially vigilant and ask what vaccinations are required in Natal.
You can find out whether vaccinations are required in Natal at any local health center. As a rule, traveling in Brazil, there is no great threat to life. Vaccinations are not needed before traveling to Natal, but to visit the Amazon. If you still want to reinsure yourself, vaccinations before traveling to Natal should be done 10 days before traveling. It is valid for 10 years and then you need to get a new one.