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Covid 4th wave: WHO Chief talks about three possible scenarios in 2022 - The virus causes less severe outbreaks with periodic spikes in transmission as immunity wanes.

Tedros adhanom ghebreyesusDavid dowdyJohns hopkins bloomberg school of public healthWorld health organization onWorld health organizationGeneral tedros adhanom ghebreyesusJohns hopkins bloomberg schoolStrategic preparednessResponse planWho chiefCovid updateHo update on covidCovid 4th wave