At the end of 2019, world is being hit by a pandemic worrying for humanity. Covid-19 first appeared in city Wuhan, China, and spread massively throughout afterwards. WHO has designated as that difficult to control March 11, 2020. As April 2020, there have been more than 2 million cases people infected with Covid-19, 195 thousand died at time. In Indonesia itself, government taken preventive mea...
