Rachel David
Rachel David
Rachel David is a Canadian television host, broadcaster, and journalist...
ProfessionTV Show Host
Date of Birth16 June 1990
CityVancouver, Canada
dose doses strain technology testing trials tried true using vaccine whether
What we're testing in the trials is the dose that we need to use for the vaccine to be effective. The technology is tried and true but what we need to find out with this completely new strain is whether the doses we are using are effective.