RÉSUMÉ
At the end of 2019, an outbreak of unknown pathogen pneumonia occurred in China, then it was named corona virus disease 2019 (COVID-19). With the rapid spread of COVID-19, a series of strict prevention and control measures were implemented to cut the spread of the epidemic. Influenza as a respiratory tract infection disease as COVID-19 might also be controlled. To assess the effects, we used the total passenger numbers sent in mainland China from 2018 to 2020 and the daily number of railway passenger (DNRP) flow in 2020 during Spring Festival travel rush to reflect the population movement and further to analyze newly and cumulative confirmed COVID-19 and influenza. We found that with implementing the series measures on COVID-19, not only COVID-19, but also influenza mitigated in China. The prevention and control measures for COVID-19 might be used in controlling respiratory tract diseases, and reducing the national health economic burden. When other countries issue measures on COVID-19 and influenza, they should consider adopting more aggressive epidemic prevention and control strategies.
RÉSUMÉ
Objective To investigate the ultrasonic image characteristics of Zenker diverticulum(ZD).Methods The ultrasonographic features were summarized using the analysis confirmed by surgery pathology or X-ray imaging of the ZD in six eases.Results The diverticulum of Zenker located behind the thyroid gland in all the six cases,with five cases to the left and one to the right.The internal hyperechoic foci caused by air was found for all the six cases.The diverticulum wall appeared to be semicircular,narrow-band and acoustic halo low echo with an average thinckness of 0.53 mm.The Doppler sonogram of the six diverticulums showed no vascular signal.Conclusions The ZD had several unique characterisitics for identification by ultrasonic diagnosis,which included hyperechoic foci caused by air,internal changes of echo after drinking water and the special layered structure of the five-layer ZD wall.