RTHK reports [link] some apartments in Hong Mei House, a residential tower block located in Tsing Yi, Hong Kong have been evacuated overnight after another person was diagnosed with the novel coronavirus living in the same building 10 stories directly below a person already diagnosed with the infection.
And fearing a repeat of the SARS in Amoy Gardens Block E, the Government swiftly reported that the drainage U traps are in “good condition”.
Notwithstanding, the condition of the U trap, not every building (see photo below) has U trap fitted.
In addition, we must also consider faulty vent pipes (refer to our photo below) .
Vent pipes are connected to the sewer system, therefore any broken, damaged or disconnected piping provides an equally risky conduit for droplets and pathogens to spread into homes.
As shown in this video clip below, if the bathroom is negatively pressurised, pathogens can be dragged into the bathroom contaminating surfaces, risky infection of the occupants.
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