Like most viruses, Covid-19 has mutated. One of the new variants (delta) is more contagious than the original virus. Resulting in increased cases, hospitalizations and mortality. The CDC recommends all people whether vaccinated or not to be cautious. Here is a partial list of suggestions by the CDC
1) All teachers, staff, students, and visitors to schools wear masks
2) Avoid crowds and poorly ventilated indoor spaces
3) Wear a mask when inside in places with high transmission rates
If you are exposed here are some of the guidelines to follow
1) Get tested for free if you are experiencing any symptoms of Covid-19
2) Test three to five days following known exposure to someone with either suspected or confirmed Covid-19
3) Isolate in your house if you have had a positive COVID-19 test in the prior 10 days
For more information click on the CDC webpage