virus vaccine worries grow— Melania Trump says son Barron had coronavirus, but no symptoms— China fires 2 health officials following new virus outbreak___— Follow AP’s pandemic coverage at http://apnews.com/VirusOutbreak and https://apnews.com/UnderstandingtheOutbreak___HERE’S WHAT ELSE IS HAPPENING:COLOMBO, Sri Lanka — Authorities in Sri Lanka will impose a curfew on a key industrial town, after a surge of COVID-19 cases centered around a garment factory in the capital’s suburbs.Police spokesman Ajith Rohana says a curfew will be imposed in Katunayake from Thursday until further notice.Katunayake houses the country’s flagship industrial zone where more than 50,000 workers are employed.