Without knowing the exact sequence that they used for each vaccine it is impossible to know. So moderna could be using a larger mrna sequence which would make it heavier. If it was 3 times the length of Pfizer then it would close to being proportional.
I am not sure we can say moderna is much more effective. From what I have read it is slightly better but that could also be due to the extra week in between the second dose as compared to Pfizer with the 3 week interval.
The other factor in the weight could be the lipids they are using to protect the mRNA. You can manufacture lipids to be all sorts of lengths so like I said it is impossible to know without having the details.
I am not sure we can say moderna is much more effective. From what I have read it is slightly better but that could also be due to the extra week in between the second dose as compared to Pfizer with the 3 week interval.
The other factor in the weight could be the lipids they are using to protect the mRNA. You can manufacture lipids to be all sorts of lengths so like I said it is impossible to know without having the details.
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