The new US guidelines open the door to a return to normal, but say masks should still be worn in certain circumstances. The federal Centers for Disease Control and Prevention has earlier said that fully vaccinated people in the United States may gather with other vaccinated people indoors without wearing a mask or social distancing However, fully vaccinated people should continue to “wear masks, maintain physical distance, and practice other prevention measures when visiting with unvaccinated people from multiple households. What does that tell you about the effcetiverness of covid-19 vaccine ?

