What are those posters

In Singapore we have many public service announcements in the form of posters, on the sides of buses, and on the radio.  On the buses is a reminder to help eliminate mosquito breeding locations to stop dengue fever (residents are fined for leaving water collection places).  On the radio was one announcement about marriage and communication, that words are only 60% of the message, that tone of voice is 30% and body language is 10%.

Hygiene is of course very important.