When the risks of COVID-19 cannot be eliminated, the most effective controls are engineering controls, followed by administrative controls and finally personal protective equipment.
Mahali ambapo hatari za COVID-19 haziwezi kukomeshwa, udhibiti zinazofaa zaidi ni za uhandisi, zikifuatiwa na udhibiti za utawala, na mwisho vifaa vya kujikinga kibinafsi.