Hong Kong will step up countermeasures to tackle the coronavirus outbreak as a surge in imported cases could crash the local medical system, leader Carrie Lam warned Saturday.Nearly 90 percent of the new confirmed cases reported since early March have been imported ones, Lam said in a news briefing."The aggravating situation of the outbreak due to rising imported cases could be long-lasting," Lam said. "The medical system could be crippled should there be a surge in cases."Surveillance on incoming visitors will be enhanced under the 14-day compulsory quarantine arrangement in place since Th…READ FULL ARTICLE