Amazingly, when this (IMHO quite good) data leaked, Moderna stock took a huge drop: https://finance.yahoo.com/markets/stocks/article/moderna-sto... (Seems like people were expecting absolutely incredible, "cure for cancer" results and had already bid up the price a lot in advance.)
Seems like absolutely huge news, and hopefully getting it approved means it can be developed even more...
I'm way out of my depth on this topic, but my understanding is that studies have shown that several currently approved mRNA vaccines cause a similar reduction in these cancers. Moderna's goal with this trial was to show their tailored vaccine outperformed a COVID vaccine (for example), and my assumption from the stock dip is that smarter people than I were not convinced.
Not a huge surprise given the absolute face ripping jump MRNA had when the vaccine was first announced. The ~$20B company jumped 174% overnight, and then climbed another 70% over the last two months, now only dropping 18% on this news.
To illustrate how much they've gone up, this 18% drop is just slightly less than their entire market cap in June (four months ago)