[xiphias2]

There's a huge difference between months and years.

The delivery platform is reusable, which is a big difference from older vaccines, where the virus that is delivered can be used only once (Sputnik-V vaccine uses 2 different delivery platforms _because of_ this.

The other thing to look at is efficiency: as the vaccines can deliver mRNAs that cells express anyways in healthy people, the lesser toxicity can mean a higher likelihood of success for the drug (which is the main problem with drug development in the last 10-20 years).