Source: Chinese Center for Disease Control and Prevention
1. Infection surveillance data
(1) National reporting population New coronavirus nucleic acid test results. After December 8, 2022, the country (excluding Hong Kong, Macao and Taiwan, the same below) will no longer carry out nucleic acid screening for all employees, and will implement all-voluntary testing. At the same time, some regions will carry out regular nucleic acid testing for key groups. Each province uses the existing nucleic acid testing information system to grasp nucleic acid testing data in real time. Affected by residents' willingness to test, the number of nucleic acid tests in various provinces has continued to decrease. For example, the number of tests was 150 million on December 9, dropped to 7.54 million on January 1, 2023, and dropped to a minimum of 280,000 on January 23.
Since December 9, 2022, the number of positive nucleic acid tests and the positive rate of the population reported in each province have first increased and then decreased. The number of positive people on December 2 It reached a peak on the 2nd (6.94 million) and then gradually declined, reaching a minimum of 15,000 on January 23, 2023; the test positivity rate peaked on December 25 (29.2%) and then gradually declined, falling to 5.5% on January 23 (Figure 1-1).
Figure 1-1 The changing trend of the number of positive nucleic acid tests for the new coronavirus and the positivity rate of the reporting population across the country
(data comes from 31 provinces (autonomous regions, municipalities) and Xinjiang Production and Construction Corps reports)
(2) New coronavirus antigen test results for the reporting population across the country. Since December 2022, some provinces have established residents’ antigen testing information collection applications (APP), and residents can voluntarily upload antigen test results. The results show that the number of antigen tests reported by each province is low, showing a gradual decreasing trend, from the highest of 1.89 million on December 19, 2022 to the lowest of 105,000 on January 23, 2023; the number of positive antigen tests and the The rate has increased rapidly since December 9, 2022, reaching a peak on December 22 (337,000, 21.3%), then fluctuating and declining, and falling to the lowest on January 23, 2023, at 4,773 and 4.5% respectively (Figure 1-2).
Figure 1-2 The changing trend of the number of positive novel coronavirus antigen tests and the positivity rate among the reporting population across the country
(Data comes from reports of 31 provinces (autonomous regions and municipalities) and the Xinjiang Production and Construction Corps)
2. Diagnosis and treatment status of fever clinics (clinics) across the country
(1) Results of the overall number of patients . The number of visits to fever clinics (clinics) across the country (excluding Hong Kong, Macao and Taiwan) reached a peak of 2.867 million on December 23, 2022, and then continued to decline, falling to 110,000 on January 23, 2023, a 96.2% decrease from the peak (Figure 2-1).
Figure 2-1 Change trend in the number of patients diagnosed and treated in fever clinics (clinics) across the country
(data comes from reports of 31 provinces (autonomous regions, municipalities) and Xinjiang Production and Construction Corps)
Explanation: Starting from December 9, 2022, the diagnosis and treatment volume of fever clinics in secondary and above medical institutions will be monitored; starting from December 21, the volume of diagnosis and treatment in fever clinics in community health service centers and township health centers will be increased (excluding village clinics and community health service stations).
(2) Results of the number of patients attending fever clinics in rural areas. The number of visits to fever clinics (clinics) in township health centers across the country reached a peak of 922,000 on December 23, 2022, and then fluctuated, falling to 50,000 on January 23, 2023, a 94.6% decrease from the peak (Figure 2-2).
Figure 2-2 Trends in the number of patients attending fever clinics (clinics) in township health centers in rural areas across the country
(Data comes from reports of 31 provinces (autonomous regions and municipalities) and the Xinjiang Production and Construction Corps)
Explanation: The number of diagnosis and treatment of fever patients in rural areas is the number of diagnosis and treatment of fever clinics in township health centers (excluding village clinics)
(3) The result of the number of visits to urban fever clinics. The number of visits to fever clinics (clinics) in secondary and above medical institutions and urban community health service centers across the country reached a peak of 1.954 million on December 22, 2022, and then continued to decline, falling to 59,000 on January 23, 2023, a 97.0% decrease from the peak (Figure 2-3).
Figure 2-3 The changing trend of the number of patients in fever clinics (clinics) in cities across the country
(data comes from reports of 31 provinces (autonomous regions and municipalities) and the Xinjiang Production and Construction Corps)
Note: The number of diagnoses and treatments in urban fever clinics includes medical institutions above level two and community health service centers (excluding community health service stations).
(4) Sentinel hospital monitoring results. Starting from December 9, 2022, new coronavirus nucleic acid testing will be carried out in 824 sentinel hospitals of the influenza surveillance network (including 546 national sentinel hospitals and 278 provincial sentinel hospitals) and 402 national network laboratories in my country. The results show that from September to early December 2022, the number of influenza-like cases (body temperature ≥38°C, accompanied by cough or sore throat) per week in sentinel hospitals stabilized at around 100,000, reaching a maximum of 600,000 in the 51st week (December 19-25); the ratio of influenza-like cases to outpatient (emergency) clinic visits was 2.7% - Fluctuating in the 3.6% range, it rose significantly to 8.5% in the 50th week (December 12-18), reached a maximum of 12.1% in the 51st week, and dropped rapidly from the 52nd week. It has dropped to 2.0% in the third week of 2023 (January 16-22), falling back to the level before this round of epidemic (Figure 2-4).
Figure 2-4 Trends in the number and proportion of influenza-like cases reported by sentinel hospitals across the country
(data comes from 824 sentinel hospitals)
The network laboratory simultaneously conducts new tests on influenza-like case specimens For coronavirus and influenza virus testing, the positive rate of the new coronavirus began to gradually increase from the 49th week of 2022 (December 9), peaked during the 51st and 52nd weeks and then began to fluctuate and decline; during the same period, the positive rate of the influenza virus gradually decreased, reaching an extremely low level by late December (Figure 2-5).
Figure 2-5 Trends in influenza-like cases COVID-19 and influenza virus positivity rates in sentinel hospitals across the country
(data comes from 402 online laboratories)
3. Inpatient diagnosis and treatment status
(1) Results of patients infected with the new coronavirus in the hospital. The number of people infected with COVID-19 in hospitals across the country reached a peak of 1.625 million on January 5, 2023, and then continued to decline, falling to 248,000 on January 23, a decrease of 84.8% from the peak (Figure 3-1).
Figure 3-1 Daily changes in the number of people infected with the new coronavirus in hospital across the country
(Data comes from reports from 31 provinces (autonomous regions, municipalities) and the Xinjiang Production and Construction Corps)
(2) Results of severe patients with positive new coronavirus infection in the hospital. Among people infected with the new coronavirus in hospitals across the country, the number of severely ill patients increased by nearly 10,000 every day from December 27, 2022 to January 3, 2023. The increase dropped significantly on January 4, reaching a peak of 128,000 on January 5, and then continued to decline, falling to 36,000 on January 23, a 72.0% decrease from the peak (Figure 3-2).
| Figure 3-2 Changes in severe patients with positive COVID-19 infection in hospital across the country
(data comes from reports from 31 provinces (autonomous regions, municipalities) and Xinjiang Production and Construction Corps)
| (3) Results of death cases of COVID-19 infection in hospital. The number of in-hospital COVID-19 deaths reached a daily peak of 4,273 on January 4, and then continued to decline, falling to 896 on January 23, a 79.0% decrease from the peak (Figure 3-3).
Figure 3-3 Changes in death cases of new coronavirus infection in hospitals across the country
(data comes from reports from 31 provinces (autonomous regions, municipalities) and Xinjiang Production and Construction Corps)
4. Local cases of new coronavirus infection Virus mutation monitoring situation
my country continues to carry out new coronavirus mutation monitoring. After December 2022, some sentinel hospitals in each province will be selected to carry out outpatient (emergency) cases, severe cases, death cases and some special groups virus mutation monitoring. At the same time, monitoring of virus mutations among people arriving at land, water and air ports will be carried out. Monitoring results show that the prevalent strains of this round of epidemic are BA.5.2 and BF.7, and no new mutant strains have been found.
(1) Overall situation. From September 26, 2022 to January 23, 2023, a total of 18,906 effective novel coronavirus genome sequences of local cases were reported across the country, all of which were Omicron mutant strains, with 69 evolutionary branches. The main prevalent strains are BA.5.2 (70.8%) and BF.7 (23.4%). The composition ratio of 13 evolutionary branches including BA.2.76 is between 0.1% and 1.3%, and the composition ratio of 54 evolutionary branches is less than 0.1% (accounting for 1.1% in total) (Figure 4-1).
Figure 4-1 National change trend chart of new coronavirus mutant strains
Description: 1. Sampling date: September 26, 2022 to January 20, 2023.
2. The numbers marked in the figure are the number of effective genome sequences of the BA.5.2 and BF.7 clade respectively.
3. "Others" refers to the evolutionary branch with a proportion of Omicron variant strains nationwide that is less than 0.1%.
(2) Monitoring of virus variants in local cases since December. From December 1, 2022 to January 23, 2023, a total of 10,165 effective new coronavirus genome sequences of local cases were reported across the country, all of which were Omicron mutants, with a total of 24 evolutionary branches. The main prevalent strains are BA.5.2 (70.2%) and BF.7 (28.3%) (Table 4-1). A total of 11 cases of variant strains of concern were found, including 1 case of XBB.1, 1 case of BQ.1.1.17, 4 cases of BQ.1.1, 3 cases of BQ.1.2 and 2 cases of BQ.1.8.
Table 4-1 National situation of new coronavirus mutant strains (December 1, 2022 to January 23, 2023)
Omicron clade | composition ratio (%) |
BA.5.2 | 70.2 |
BF.7 | 28.3 |
BA.5. 1 | 0.4 |
BA.5.2.1 | 0.3 |
BA.2.76 | 0.2 |
BA.5.2.20 | 0.2 |
BN.1.3 | 0.1 |
other | 0.3 |
Total | 100.0 |
(3) The mutation of the new coronavirus by province. BF.7 is the dominant strain in Beijing and Tianjin; BF.7 and BA.5.2 are basically the same in Jiangsu and Inner Mongolia; BA.5.2 is the dominant strain in other provinces (Figure 4-2).
Figure 4-2 New coronavirus mutation monitoring situation in each province
Description: 1. Sampling time: December 1, 2022 - January 20, 2023.
2. The numbers marked in the figure are the number of effective genome sequences of the BA.5.2 and BF.7 clade respectively.
5. Progress of COVID-19 Vaccination
After the large-scale vaccination of new coronavirus vaccine was launched across the country on December 15, 2020, the vaccination speed accelerated significantly, with 100 million doses of vaccination completed in 5 days, and the highest number of vaccinations in a single day was 24.74 million doses. Our country is actively and steadily promoting vaccination work. As of January 20, 2023, a total of 3.488 billion doses of vaccination have been completed (Figure 5-1). The first dose and full vaccination coverage rates for the entire population reached 92.9% and 90.5% respectively (Figure 5-2).
Figure 5-1 Cumulative number of doses of COVID-19 vaccine administered by month
(Data comes from reports from 31 provinces (autonomous regions, municipalities) and Xinjiang Production and Construction Corps)
Figure 5-2 First dose vaccination and full basic immunity coverage among the entire population by month
(Data comes from reports from 31 provinces (autonomous regions and municipalities) and the Xinjiang Production and Construction Corps)
According to data from a recent special survey on the elderly, vaccination coverage for the elderly over 60 years old accounts for 96% of the elderly population.The number of people who received full vaccination and the first dose of booster vaccination accounted for 96% and 92% of the elderly population who met the vaccination time interval respectively (Figure 5-3).
Figure 5-3 New coronavirus vaccination rate of people over 60 years old based on the basic population
(Data comes from 31 provinces ( District, city) and Xinjiang Production and Construction Corps report)
Note: 1. The numerator of the first dose vaccination rate calculation is the population who have received at least 1 dose of the new coronavirus vaccine that is currently conditionally marketed or for emergency use, and the denominator is the number of people in the recent special survey of the elderly.
2. The numerator of the full vaccination rate calculation is the elderly population who have received 2 doses of inactivated vaccine, 1 dose of adenovirus vector vaccine, and 3 doses of recombinant protein vaccine. The denominator is the population who have received 1 dose of inactivated vaccine, 1 dose of adenovirus vector vaccine, and 2 doses of recombinant protein vaccine, and the interval after vaccination is 28 days (4 weeks).
3. The numerator for calculating the first dose booster vaccination rate is the elderly who have completed the first dose of booster vaccination, and the denominator is the population who have received 2 doses of inactivated vaccine and 1 dose of adenovirus vector vaccine, and the interval between full vaccinations is 3 months. (Due to the short period of time for booster vaccination with recombinant protein vaccines, people who have received 3 doses of recombinant protein vaccines are currently not included in the denominator).
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