Based on this article stating that the Moderna offers 80% after first dose compared to 50.2% for the Pfizer. Additionally this seemed like a positive for Moderna over the Pfizer “ Some early data suggest that the Moderna vaccine might protect vaccinated people from asymptomatic infections as well as symptomatic disease. While it’s clear that the vaccine, along with Pfizer’s, prevents people from developing COVID-19 symptoms, stopping infections entirely is crucial to curb the coronavirus’ spread and build immunity in communities. ”
https://www.sciencenews.org/article/covid-19-coronavirus-moderna-vaccine-fda-approval
CTopher