Isn't that apples and oranges comparisons? They're not talking effective rates only relative rates. They could also claim having mRNA + adenovirus vaccines im

Isn't that apples and oranges comparisons? They're not talking effective rates only relative rates. They could also claim having mRNA + adenovirus vaccines improve efficacy (not sure if there is such a study) but that does not say anything about mRNA vs adenovirus by themselves.