"The most recent one million cases of COVID-19 were reported in just one week", Tedros Adhanom Ghebreyesus said during a virtual conference on COVID-19 vaccine development and access across the continent.
Mr Tedros also advised a information briefing he backed Saudi Arabia's determination to ban pilgrims from overseas from attending the yearly Haj pilgrimage to enable restrict the spread of the virus.
The sudden rise has created a dearth of oxygen concentrators needed to support breathing of Covid-19 patients suffering from respiratory distress.
"In the first month of this outbreak, fewer than 10,000 cases were reported to WHO".
While some companies have said they won't profit off the vaccines, a lack of transparency on the cost of research, development and manufacturing makes the effort to assess the commitments nearly impossible, the group said.
Nowadays, when coronavirus, which spreads to 188 countries worldwide and continues to show the effect of coronavirus infecting more than 8.8 million people, different institutions and governments continue their vaccine development efforts for COVID-19 disease.
Medical oxygen is produced using concentrators that extract and purify it from the air.
The urgency is rising from a health and financial perspective, underscored by a recent surge in the USA. cases. "Eighty percent of the market is owned by just a few companies, and demand is now outstripping supply", said Tedros.
The organisation also identified a further 170 000 concentrators that can be available over the next six months with a value of US$100 million dollars.
"They've already advanced into phase two, and we expect to see results very soon from those human studies and are already planning phase three trials in many countries".
Ongoing talks have enabled World Health Organization to buy 14,000 oxygen concentrators, which will be sent to 120 countries in the coming weeks.
Access to covid-19 Tools Accelerator (ACT-Accelerator) on Friday published its consolidated investment case, alongside the costed plans of the member organizations.
The hajj is one of the world's largest mass gatherings.