(a) Workers in the healthcare sector involved in the medical treatment or nursing of person(s) suffering from SARS, as well as in service ancillary to such treatment or nursing;

(b) Workers in any sector involved in identification, detection, tracing,isolation, detention, supervision or surveillance of person(s) suffering from SARS;

(c) Workers engaged in research on SARS, or in service ancillary to such research; or

(d) Workers involved in laboratory, post-mortem, or funeral services work, where there is contact with human bodies or other materials which is a source of SARS infection, or in an occupation ancillary to such employment.