题目内容：

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下画一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词；

2.只允许修改10处，多者（从第11处起）不计分。

The “novel” coronavirus, being called COVID-19 officially, had not previously been detected before the outbreak is reported in Wuhan, China in December, 2019. Infection with 2019-nCoV can cause mild symptom including a runny nose, sore throat, cough, and fever. It can be most severe for some persons and cause pneumonia or breathing difficulties. More rare, the disease can be deadly. It can be transmitted from person to person, usually after close contact with infected patient that even seems healthy.

To protect yourself, wash your hands frequently with soap and water. Maintain at least 1 meter distant between yourself and other people, particularly those who are coughing and sneezing. Wear a medical mask can help limit the spread of some respiratory (呼吸的) diseases. Therefore. it has to be combined to other prevention measures including washing hands and avoiding close contact to take effect.