1. As coronavirus pandemic pushes more grocery shoppers online, stores struggle to keep up with demand;M Repko;CNBC,2020
2. Presymptomatic Transmission of SARS-CoV-2—Singapore, January 23–March 16, 2020;WE Wei;MMWR Morb Mortal Wkly Rep,2020
3. Asymptomatic and Presymptomatic SARS-CoV-2 Infections in Residents of a Long-Term Care Skilled Nursing Facility—King County, Washington, March 2020;A Kimball;MMWR Morb Mortal Wkly Rep,2020
4. Transmission Potential of SARS-CoV-2 in Viral Shedding Observed at the University of Nebraska Medical Center;JL Santarpia;medRxiv,2020
5. ServiceApr. 2 RF, 2020, Pm 6:45. You may be able to spread coronavirus just by breathing, new report finds [Internet]. Science | AAAS. 2020 [cited 2020 Apr 24]. Available from: https://www.sciencemag.org/news/2020/04/you-may-be-able-spread-coronavirus-just-breathing-new-report-finds