In Sao Paulo, Brazil's most populous city and its economic capital, the second day of carnival celebrations saw a number of samba schools parade through the streets in jaw-dropping costumes covered in diamantes, feathers... and not much more.

Medical experts have warned that the celebrations held all over Brazil in the coming days could become an 'explosive cocktail' that will see the mosquito-transmitted Zika spread at globally.

The annual mega-bash famed for lavish and skimpily dressed samba parades and all-night street dancing is expected to attract as many as five million people from all over the world.

(Pics - Daily mail)