說說為什麼流感疫苗能夠降低新冠狀病毒死亡率

廣州市統計五年的結果發現，冠狀病毒陽性者，有1/3感染其他病毒，主要是流感。

跟美國情況類似。

Of the 294 HCoV positive patients, 34.69% (101 cases) were co-infected by

other common respiratory viruses, and influenza virus was the most common co

-infecting virus (30/101, 29.70%).

美國Ohio州研究結果：Of 832 adult respiratory specimens screened, 13 (1.6%) cases of CoV-HKU1 were identified. Adults age ranged between 23 and 75 years and 6 (46%) were males. All of whom had 1 or more respiratory symptoms, and 5 (38%) also reported 1 or more gastrointestinal symptoms. Eleven (85%) reported history of smoking and 5 (38%) used inhaled steroids. Seven (54%) required hospitalization, 5 (71%) of these needed supplemental oxygen, and 2 (29%) were admitted to intensive care. Median length of hospitalization was 5 days. Eight (62%) received antibiotics despite identification of CoV-HKU1. Infectious work-up in 1 patient who died did not reveal any other pathogen. In 2 (15%) CoV-HKU1-positive adults, the only viral coinfection detected was influenza A. 15%冠狀病毒感染者同時感染A型流感。

這些雙重感染者更容易發展成重症，注射流感疫苗后，同時感染流感病毒的可能性大大降低，減少重症患者，降低死亡率。