| Date | Subject |
| 9 June 2015 | Letter to District Councils |
| 9 June 2015 | Letter to Healthy Cities |
| 9 June 2015 | Letter to NGOs |
| 9 June 2015 | Letter to all government bureaux/departments/organisations-Middle East Respiratory Syndrome |
| 3 June 2015 | Letter to all government bureaux/departments/organisations |
| 3 June 2015 | Letter to District Councils, Healthy Cities and NGOs |
| 13 June 2014 | Letter to District Councils |
| 13 June 2014 | Letter to Healthy Cities |
| 13 June 2014 | Letter to NGOs |
| 7 May 2013 | Letter to Hotel Association |
| 6 May 2013 | Letter to Transport and Housing Bureau, Transport Department - health advice for public transport |
| 6 May 2013 | Letter to all government bureaux/departments/organisations - the advice for workplace |