As I said, my contacts in the medical field have the same opinion as the article. It's "unknown" officially, but apparently people on HN don't know anyone in the field who is literally on the front lines researching this. The overwhelming opinion (articles aren't being written yet, expect some in a few weeks) is that the Pfizer vaccine does not actually prevent spread of the virus, only symptoms which decreases the probability of spread, but does not completely prevent spread.
As I said, my contacts in the medical field have the same opinion as the article. It's "unknown" officially, but apparently people on HN don't know anyone in the field who is literally on the front lines researching this. The overwhelming opinion (articles aren't being written yet, expect some in a few weeks) is that the Pfizer vaccine does not actually prevent spread of the virus, only symptoms which decreases the probability of spread, but does not completely prevent spread.