Yang J, Zheng Y, Gou X, Po K, Chen Z, Guo Q, et al. Prevalence of comorbidities in the novel Wuhan coronavirus (COVID‐19) infection: a systematic review and meta‐analysis. International journal of infectious diseases. Int J Infect Dis 2020; 94: 91-5.
World Health Organization. Guidelines for the collection of clinical specimens during field investigation of outbreaks. Geneva: World Health Organization; 2000. 2018.
World Health Organization. Guidance on regulations for the transport of infectious substances 2019-2020: applicable from 1 January 2019. Geneva: World Health Organization; 2019.
World Health Organization. Laboratory biosafety manual. 3rd ed. Geneva: World Health Organization; 2004.