"Next week at the WHO Executive Board, I will be encouraging all countries to fulfill their pledges to COVAX," He said during a press briefing.
"I call for a collective commitment so that within the next 100 days, vaccination for health workers and those at high-risk in all countries are underway," he told journalists.
Today, there are more than 1.93 million dead and nearly 90 million confirmed cases.
Over the weekend, WHO was notified by Japan about a new variant of the virus.
"The more the virus spreads the higher the chance of new changes to the virus. Most notably, transmissibility of some variants of the virus appears to be increasing. This can drive a surge of cases and hospitalizations, which is highly problematic for health workers and hospitals already close to breaking point," he explained.
Last week, WHO released a comprehensive implementation guide and risk-monitoring framework to help countries set up high-impact sequencing programmes.
Building upon its existing lab networks, WHO is working with countries to enhance sequencing capacity and we extend our support to all countries who need it.
"What’s most critical is that we sequence the virus effectively so we know how it’s changing and how to respond," he stated.
"For example, while diagnostics and vaccines still seem to be effective against the current virus, we may need to tweak them in the future," he added.