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Scientists say new disinfectant protects surfaces from coronavirus for 90 days

Researchers at the Hong Kong University of Science and Technology say their new disinfectant spray can "inactivate" viruses from surfaces for 90 days, like the one causing COVID-19.

Researchers at a top university in Hong Kong say they have developed a new anti-microbial coating that can be sprayed on surfaces to kill most bacteria and viruses --including the coronavirus -- for up to 90 days.

Known as MAP-1, the anti-microbial coating has been designed for use across a range of surfaces including glass, metals, plastic, leather and fabrics, according to the Hong Kong University of Science and Technology (HKUST).  

The surface coating lasts "significantly longer" than conventional disinfectants that use alcohol or bleach, which lose their function as the liquids evaporates, according to HKUST.  To help achieve this, it relies on heat-sensitive polymers that its inventors say responds to contamination from touch or droplets. It does this by releasing a larger amount of disinfectant when it senses an increase in temperature that can take place whenever our hands touch a surface or when moisture from droplets. 

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