CNN  — 

As families prepare to gather for Labor Day and children head back to schools, coronavirus cases are once again on the rise.

Covid-19 hospital admissions are up more than 18% in the most recent week, according to the U.S. Centers for Disease Control and Prevention. Some experts are encouraging a return to masking, especially for older adults and individuals most vulnerable to severe disease.

With concerns that Covid-19 could spread as people gather, this has led to many questions about disease prevention: What virus prevention measures should those planning Labor Day events consider? As kids return to the classroom, should they mask? And how should families prepare for the possible confluence of the coronavirus, flu and respiratory syncytial virus (better known as RSV) that may occur this fall?