Parents end year with incredible stress

Driving the news: A wave of K-12 schools is going virtual, citing rising cases among students and staff.

• A Pfizer vaccine trial for kids under 5 failed to generate the desired immune response, the companies said Friday.
• Kids 15 and under aren't eligible for boosters.

Between the lines: Viral TikToks alluding to potential violence in schools today horrified parents and sparked law-enforcement alerts.

• Some parents kept their children home. Some districts canceled classes or limited where students could go inside school buildings. Many increased security, per AP.

TikTok said: "[W]e are deeply concerned that the proliferation of local media reports on an alleged trend that has not been found on the platform could end up inspiring real world harm."