Pfizer Inc and BioNTech SE said on Thursday that real-world data from Israel suggests their Covid-19 vaccine is 94 percent effective in preventing asymptomatic infections, suggesting it could significantly reduce virus transmission.

The companies also said the latest analysis of the Israeli data shows the vaccine was 97percent effective in preventing symptomatic disease, severe disease and death. That is in line with the 95 percent efficacy reported in the vaccine's late-stage clinical trial in December...