Initial study brings hope vaccine will reduce Covid transmission
Data from researchers in Israel, which has inoculated swathes of its population, suggests the Pfizer/BioNTech vaccine is reducing viral load, a key signal that the intervention could diminish the spread of Covid-19.
Evidence that the coronavirus vaccines being deployed globally are dramatically effective in reducing severe disease and death in symptomatic Covid-19 is abundant. But a big question remains unanswered: can they thwart transmission, in other words stop people from passing on the virus?
