Health Highlights: Aug. 23, 2021

Here are some of HealthDay's top storiesfor Monday, Aug. 23:

FDA could give full approval to Pfizer's COVID vaccine on Monday. The U.S. Food and Drug Administration could announce its full approval of the Pfizer-BioNTech coronavirus vaccine on Monday, the New York Times reported. Full approval could boost vaccination rates and encourage vaccine mandates at businesses and schools, experts say. Read more

Israeli data show big boost in immunity in seniors after 3rd vaccine dose. As the Delta variant triggers a surge in infections and some studies show waning immunity from two-dose mRNA vaccines, new data out of Israel finds a four-fold jump in protection against infection after seniors there got a third dose of the Pfizer vaccine.Read more

Teachers' unions, doctors agree: precautions crucial for back to school. Speaking in interviews with HealthDay Now, experts representing teachers, physicians and even school boards say that American kids must return to classrooms this term, but with vaccine and mask mandates in place.Read more

Do men have a biological clock, too? There's much talk of women's waning fertility with age, but a new study of couples undergoing fertility treatments found that men also appeared less likely to become dads as the years advanced.Read more

Mentally stimulating jobs may help ward off dementia. In another 'use it or lose it' finding for the brain, a study of more than 100,000 working Europeans finds that those whose jobs challenged them intellectually were less like to develop dementia. Read more