After 3 to 7 days, patients may start to cough and experience shortness of breadth, and X-ray changes of pneumonia, usually after a further 3 to 4 days.
After 3 to 7 days, patients may start to cough and experience shortness of breadth, and X-ray changes of pneumonia, usually after a further 3 to 4 days.
经过3-7天后，病人可能开始咳嗽与发生呼吸困难，而且再过3-4天后，胸部X光通常会发现肺炎。