常州科帆化工有限公司成立于2012年，是一家集研发、生产、销售于一体的综合性化工企业，总部位于江苏省常州市，在河南开封、宁夏银川、湖北荆州设有三大合作生产基地，产品涉及：农药中间体、医药中间体、香精香料、医用胶粘剂等行业。
27
2019
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08
Preliminary studies showing a disproportionately low percentage of smokers among COVID-19 patients have led to suggestions that smoking protects against COVID-19. However, these studies have not demonstrated a causal association between smoking and a reduced risk of either SARS-CoV-2 infection or COVID-19 disease severity. Much more research is needed before any causal association can be established. Furthermore, the established science indicates that smoking increases the risk of developing respiratory infections and complications in general.
27
2019
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08