Dr Mohamed says there is a need for developing better vaccines. "Depending on whether the findings that we are doing now show that the vaccine works we expect a new vaccine to be available between 2016 and 2020."

Meanwhile, the Global Fund to Fight Aids, Tuberculosis and Malaria is demanding the recovery of $34 million which remains unaccounted for in some countries that received aid.

A report by the Fund's Inspector-General recently revealed that there was grave misuse of money in four out of 145 countries that received grants from the Fund to combat the three diseases.