They’re saying the family members (”a handful”) are being closely watched and will be for the period of time they determine to clear.
Also that he was tested ‘negative for fever in Liberia’ before flight..which is the line of defense they’re using before flights.
They’re also saying he would not have infected any on the flight.....for he had to have symptoms for it to spread.
Other than family members I wonder how many others has he had interaction with? Mailman? Pizza Delivery guy, may he went to the pharmacy to get something for his ‘flu’??