Welcome to Sunday! The top five articles on our website this week are displayed below.

Editor’s pick: Over the past few weeks a surge in the number of COVID-19 cases among the unvaccinated undid some of the progress the country has made against the coronavirus. The federal government on Thursday issued tougher vaccination guidelines for its employees, a move that will affect millions of workers. New York City and California have issued similar orders. Could the same thing happen in your own private workplace? In this piece from December 2020, law professor Ana Santos Rutschman considers the issues and lays out the rights workers have.

Emily Costello

Managing Editor

Swimming offers a host of beneficial effects on the brain. Stanislaw Pytel/Stone via Getty Images

Swimming gives your brain a boost – but scientists don’t know yet why it’s better than other aerobic activities

Seena Mathew, University of Mary Hardin-Baylor

Mounting research shows that going for a swim can preserve memories, reduce mood disorders and increase mental acuity in all age groups.

New research has found that some men who have had COVID-19 might experience unwanted sexual side effects. tuaindeed/iStock via Getty Images

COVID-19 could cause male infertility and sexual dysfunction – but vaccines do not

Ranjith Ramasamy, University of Miami

New studies show men who have had COVID-19 could face serious reproductive health issues.