The volume of diagnosis and treatment fluctuated and declined. CDC announced the infection of COVID-19 in July: 455 cases of severe COVID-19 | cases | disease control
Epidemic situation of novel coronavirus infection in China
Reports of severe cases and deaths of neo-coronavirus infection nationwide, 1.
From July 1 to July 31, 2023, 31 provinces and Xinjiang Production and Construction Corps in China reported 455 new severe cases and 65 deaths. See Figure 1.
![The volume of diagnosis and treatment fluctuated and declined. CDC announced the infection of COVID-19 in July: 455 cases of severe COVID-19 | cases | disease control](https://a5qu.com/upload/images/7cf702beaeb0c4db9b1463eaee64189a.jpg)
Figure 1 Report of new severe and fatal cases of COVID-19 infection in China
Diagnosis and treatment of fever clinics nationwide in 2.
The outpatient diagnosis and treatment volume of fever in 31 provinces and Xinjiang Production and Construction Corps in China has decreased from 162000 on July 1, 2023 to 124000 on July 31. See Figure 2.
![The volume of diagnosis and treatment fluctuated and declined. CDC announced the infection of COVID-19 in July: 455 cases of severe COVID-19 | cases | disease control](https://a5qu.com/upload/images/e4560e6ed25bf6de9165bb16de38bf1f.jpg)
Figure 2: Trend of changes in the number of people diagnosed and treated in fever clinics nationwide
Monitoring of sentinel hospitals in 3.
The proportion of influenza like cases in outpatient visits at national sentinel hospitals has continuously decreased from 4.1% in the 27th week of 2023 to 3.6% in the 30th week. See Figure 3-1.
![The volume of diagnosis and treatment fluctuated and declined. CDC announced the infection of COVID-19 in July: 455 cases of severe COVID-19 | cases | disease control](https://a5qu.com/upload/images/e048960476040eaaf657a4dc339456b8.jpg)
Figure 3-1 Trends in the proportion of influenza like cases reported by sentinel hospitals nationwide
The positive rate of COVID-19 in influenza like cases continued to decline from 42.5% in the 21st week to 12.0% in the 28th week, and then began to rise slightly, and rose to 13.4% in the 30th week. See Figure 3-2.
Figure 3-2 Change trend of positive rate of COVID-19 and influenza virus of influenza like cases in national sentinel hospitals
![The volume of diagnosis and treatment fluctuated and declined. CDC announced the infection of COVID-19 in July: 455 cases of severe COVID-19 | cases | disease control](https://a5qu.com/upload/images/a8b0f165092e3b0641e2000b6c9f0994.jpg)
Monitoring of virus mutation in local cases in 4.
From July 1 to July 31, 2023, 31 provinces and the Xinjiang Production and Construction Corps reported a total of 9591 valid genome sequences of COVID-19 from local cases, all of which are Omikron variants, covering 116 evolutionary branches. The main epidemic strains are XBB series variants, and the top three are XBB.1.9 and its sub branches, XBB.1.16 and its sub branches, XBB.1.22 and its sub branches, respectively.
According to the sampling date, the proportion of XBB and its sub branches gradually increased, from 96.3% in the 27th week of 2023 to 99.1% in the 30th week. See Figure 4.
![The volume of diagnosis and treatment fluctuated and declined. CDC announced the infection of COVID-19 in July: 455 cases of severe COVID-19 | cases | disease control](https://a5qu.com/upload/images/28f3a344d2de3d1e28fc39ddf6b9494b.jpg)
Figure 4 Variation trend of novel coronavirus infection local cases in China