Buildings that bustled with diners, drinkers and shoppers just weeks ago have gone quiet. Hotels that housed vacationers and business travelers are empty, while the industry in the U.S. loses an estimated $1.4 billion a week. Offices are eerily quiet. And the tendrils of frost are spreading to industrial properties, apartments, and even student housing -- usually stable in hard times. This time, universities are ordering students off campus. As the coronavirus spreads, all the once-reliable havens are mired in uncertainty. “On the investor side, there’s widespread panic,” said Alexi Panagiotakopoulos, partner at Fundamental Income, a real estate strategy firm.