There we underwent multiple health and security checks. My temperature was taken, I filled out a detailed questionnaire indicating I had not traveled to China, Italy, South Korea, or other coronavirus hotspots. Two quarantine officers gave me a checklist of instructions for after I left the airport, including that I take my temperature twice daily and immediately report any abnormal symptoms to the Department of Health.
If I was to land in Hong Kong today, it would be even stricter. The local government announced this week that anyone arriving from a foreign country is required to self-quarantine for two weeks, and will likely be issued an electronic monitoring bracelet that will alert the authorities if they leave their home or hotel.