(Sharecast News) - The World Health Organization warned on Monday that there is a possibility that a "silver bullet" to combat Covid-19 may never come despite the existing strong hopes for a vaccine.
The WHO also said that the road to normality could take a lot longer than initially expected, especially as some nations that thought they were over the worst were now experiencing a resurgence.
WHO Director-General Tedros Adhanom Ghebreyesus said: "The message to people and governments is clear: 'Do it all'."
Speaking from the UN body's headquarters in Geneva, he urged people to wear face masks as an act of solidarity with other people: "A number of vaccines are now in phase three clinical trials and we all hope to have a number of effective vaccines that can help prevent people from infection. However, there's no silver bullet at the moment - and there might never be."
"There are concerns that we may not have a vaccine that may work, or its protection could be for just a few months, not more. But until we finish the clinical trials, we will not know," he added.
The WHO head also said that its advance investigation team had not yet returned from China, where the virus had originated.
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