So, ummm... @IvankaTrump, it’s exciting but you need to kinda mention it’s only the results from only the *first 7 days*. Pfizer vaccine needs a later booster shot too. So 7 days isn’t nearly enough data. We need longer trial data on #COVID19 efficacy & safety. Simmer down now.

2) Further, Pfizer’s vaccine also needs deep freezing and cold chain in transport/storage, which is logistically expensive / risky. Meanwhile J&J’s pending vaccine is a single dose one and doesn’t need freezing, only standard refrigeration, which would be huge if also successful.

3) And cold chain is risky — any failure to keep the vials frozen for just a few minutes would mean the vaccine won’t be as effective. And sometimes you wouldn’t know if there was a temporary freezing chain failure unless sensitive detectors.