Open borders are a problem when trying to control the spread of Covid. Factcheck insists that "The Biden administration has made no changes to COVID-19 testing policies for either U.S. Immigration and Customs Enforcement or Customs and Border Patrol."
at least for those who get caught. Arizona's Democratic Governor has sent in 250 National Guard troops to promote some order. The border patrol has been dumping groups of illegal non-citizens of in small Arizona towns. The Mayors and Governors fear outbreaks and wonder what they are going to do with them if they do get sick.

India is having a terrible time with Covid now but the U.S. is not one of the countries forbidding travel to and from India. This might be a larger problem for northern tier states. Perhaps each state could require a two week quarantine for anyone on those planes if the federal government doesn't.