The disease is more common in tropical and subtropical climates. Its incidence has grown dramatically worldwide in recent decades.
WHO says the number of weekly reported deaths from COVID-19 is declining, following the spike in China after it lifted restrictions.
The spending itself is distorted. That is the biggest challenge that has generated everything that we have seen.
Mr Ghebreyesus said in the past 20 years alone, smoking has fallen by a third, maternal mortality has fallen by a third and child mortality has halved.
WHO said flooding and torrential rains had affected more than 1.4 million people in the three countries.
Equitorial Guinea has so far reported nine deaths as well as 16 suspected cases of the Marburg virus disease.
WHO said the two variants circulating in China were already present in European countries, and are not expected to significantly impact the region.
The experts will recommend a list of priority pathogens that need further research and investment.
Ms Moeti said 208 million people still practice open defecation.
Mr Ghebreyesus said that oral health had long been neglected in global health, but many oral diseases could be prevented and treated with the cost effective measures.
