Moderna vaccine recipients saw 95% effectiveness in preventing hospitalisation, followed by Pfizer-BioNTech (80%), and J&J (60%), respectively.
Overall vaccines' efficacy against hospitalisation was 86% for all age groups but this fell to 76% for those over 75. It remains unclear why Moderna's vaccine appears to have a slight edge on Pfizer and Johnson & Johnson's vaccine.
It could be linked to its higher dosing level of 100 micrograms versus 30 micrograms, or possibly the greater interval between the first and second shots (four versus three weeks).
Nevertheless, the three vaccines have proven to protect adults robustly --greater than 82% --against hospitalisation, emergency room, and urgent-care trips.