The Prevention and Control of Disease (Disclosure of Information) Regulation (Cap. 599D) came into operation in Hong Kong on 8 February 2020. The Regulation was made by the Chief Executive in Council under section 8 of the Prevention and Control of Disease Ordinance (Cap. 599), and will remain in force until 7 May 2020. In reference to the “public health emergency” over the “Severe respiratory disease associated with a novel infectious agent”, as specified in s. 8(5), Cap. 599 and 34AAA of Schedule 1, Cap. 599 respectively:

 (1) A person commits an offence if the person, when attended by a medical practitioner acting in the course of professional practice, knowingly gives to the medical practitioner any false or misleading information of the person that is relevant to the risk of exposure to or contracting the disease.

(2) A person who commits an offence under subsection (1) is liable on conviction to a fine at level 3 and to imprisonment for 6 months.

(3) In this section —
information, in relation to a person, means any information about —
(a) the places where the person has been to;
(b) the medical history of the person; or
(c) any contact between the person and other persons.

The full text of the Regulation is available at https://www.elegislation.gov.hk/hk/cap599D.
The Ordinance is available at https://www.elegislation.gov.hk/hk/cap599.