MAKKAH: The General Presidency for the Affairs of Two Holy Mosques has announced that it is using ozone technology to sterilize the Grand Mosque and Kaaba in Makkah as part of its ongoing precautionary measures to prevent the spread of COVID-19. The presidency has installed ozone-technology sterilization devices in the Grand Mosque’s air-conditioning systems and has disinfected floors and carpets using mobile devices. Ozone gas is high in oxidants, which are able to kill microorganisms including some bacteria and viruses. In addition, it does not leave toxic residue behind, unlike many industrial cleaning solutions. The sterilization measures have been carried out according to the directives of the General President of Two Holy Mosques Sheikh Dr. Abdul Rahman bin Abdulaziz Al-Sudais.