### Chinese: 与此同时，世界各地的科学家正在观察病例数和住院率，同时测试目前的疫苗和治疗方法的效果。
### English: Meanwhile, scientists around the world are watching the number of cases and hospitalization rates, while testing the effectiveness of current vaccines and treatments.

### Improved English: At the same time, scientists from all over the whole world are observing the number of medical cases and the rate of hospitalization, as well as testing the effect of the current vaccines and treatment method.
