I just got back from Germany yesterday. We were freaked out on Thursday morning after the travel restrictions were announced. It took 12 hours for Delta to call me back to change my flight. However, that didn't happen because of the fees to change airports was ridiculous.
Our flight from Dusseldorf, Germany to Atlanta was maybe 40-50% full. When we arrived in Atlanta, the CDC boarded our plane and gave us a survey. After we filled it out, they gave me a PowerPoint that recommended I stay home for 2 weeks if I feel sick. After that we went through customs, and were on our way to DFW. People are freaked out more in the DFW area than Germany.