In the peer-reviewed study, published in the journal “Science,” researchers found that during the outbreak of the Alpha variant in early 2021, Israeli kids who lived with two vaccinated parents had a 72 percent lower risk of infection than children who lived with unvaccinated parents. In families with one vaccinated parent, the risk reduction was 26%.

It is unclear how precisely those figures hold for the current Omicron wave or for future outbreaks, but the study’s authors believe that the broad trend identified still applies.

They emphasize that the sample size for the Alpha research was very large, some 155,000 households. The participants were members of the Clalit healthcare provider, which conducted the study in collaboration with researchers from Harvard University and Tel Aviv University.