Fans in the stands will spread Covid Delta everywhere. (NFL, MLB, NBA, NHL and minor leagues)

[PSPS]

2. "The vaccine works"

Well, it works in that it virtually eliminates serious symptoms, hospitalization and death. So it is certainly worthwhile to get vaccinated. But it doesn't reliably prevent infection. So, if you get infected with delta, have little or no symptoms, and go about your usual business, you can still spread the virus plus you will still be susceptible to long-hauler effects like cardio, brain fog, etc.

The best thing to do is to get vaccinated plus maintain all the precautions such as wearing a mask and avoiding groups of unmasked people.