Effectiveness of Surgical and Cotton Masks in Blocking SARS-CoV-2: A Controlled Comparison in 4 Patients

Ann Intern Med. 2020 Jul 7;173(1):W22-W23. doi: 10.7326/M20-1342. Epub 2020 Apr 6.
No abstract available

Keywords: COVID-19; Coughing; Oral health; Penicillin; Phosphates; Serum albumin; Streptomycin; Upper respiratory tract infections; Viral load; Viral transmission and infection.

Publication types

  • Letter
  • Retracted Publication