Airlines in Pakistan resumed flights to and from China Monday after health authorities said they were confident they had systems in place to keep the deadly coronavirus out of the country. The move comes as dozens of global airlines are halting flight services with China, and governments are increasingly barring entry to anyone who has recently visited the country. China has long been an all-weather ally of Pakistan and in recent years has provided Islamabad with billions of dollars in loans as part of Beijing’s global Belt and Road infrastructure initiative.