by Secretary for Food and Health

“ If a health officer has reason to suspect that a person is a contact or is infected with a specified infectious disease or is contaminated, the health officer may subject the person to medical surveillance or a medical examination or a test, which must not be more intrusive or invasive than is necessary for ascertaining the person’s health condition. ”

“ If a person who is placed under quarantine or isolation in a hospital or a similar establishment escapes, he may be stopped, detained and conveyed back to the place or any other place authorized by a health officer. ”

“ It is a defence to a charge under section 5, 7 or 8 to prove that the information required to be given was not within the knowledge of the person charged and could not reasonably have been ascertained by him. ”