This is worrying me as i have a friend coming to visit from Taiwan soon.

"The Trump administration has declared a public health emergency over the coronavirus outbreak and announced it will temporarily bar entry to the US for people traveling from China unless they are Americans or immediately related to US citizens."

Since America (and Australia) officially adheres to the 'one-China' policy then i assume the ban applies to Taiwan citizens as well. If Australia follows suit then i worry my friend won't be allowed in.

Apart from my own situation, it must cause a massive economic disruption if all travel between China and the rest of the world ends up being closed down. Using SARS as a guide - it lasted for about 6 months. I'd hate to be a tourist business relying on Chinese customers