"Travel restrictions to China because of the coronavirus have come just as Apple Inc’s (AAPL.O) engineers usually jet off to Asia to perfect the production of this fall’s new iPhones, former employees and supply chain experts told Reuters."

Coronavirus clouds Apple's timeline for new iPhones - Reuters https://www.reuters.com/article/uk-china-health-apple-iphone-focus/coronavirus-clouds-apples-timeline-for-new-iphones-idUSKBN20J2GJ