Sir: Karachi is one of the biggest and most populist city of Pakistan and due to lack of civic sense and habit of littering, viral diseases always appeared and gripped the city within a few moments. Presently, Coronavirus is knocking at our door and we have confirmed Corona patients in Karachi. So the government has decided to shutdown the whole city which is the best prevention to stop the spreading of epidemic Coronavirus. So only vegetables, general stores, and medical stores are allowed to open. NASEEMA BEZANJO Via E-mail