There were news stories on Sunday Feb 23 about a train being halted in Italy, near the Brenner Pass due to symptomatic passengers. A subsequent news story indicates that in about 4 hours the passengers (who were located near the Brenner pass) tested negative for Coronavirus after the train had been halted. Is it conceivable that a test could be administered and processed so quickly with the passengers near the Brenner Pass? The Diamond Princess passengers didn't seem to get test results this fast and they were in a major metropolitan area.
https://www.straitstimes.com/world/europe/coronavirus-austria-stops-train-services-with-italy-over-suspected-infections
"VIENNA (REUTERS) - Austria suspended train services over the Alps to Italy for about four hours late on Sunday (Feb 23) before restarting them after two travellers tested negative for coronavirus.
A train carrying about 300 passengers from Venice, Italy, to Munich in Germany was halted on the Italian side of the Brenner Pass before being allowed to continue its journey after the two tested negative, authorities said.
“We can give the all-clear,” Austria’s interior ministry said in a statement."