About the Authors

Rosamund Chapman

Ros.Chapman@uct.ac.za

Affiliations Institute of Infectious Disease and Molecular Medicine, Albert Einstein College of Medicine, Bronx, New York, United States of America, Division of Medical Virology, Department of Clinical Laboratory Science, Albert Einstein College of Medicine, Bronx, New York, United States of America

Helen Stutz

Affiliations Institute of Infectious Disease and Molecular Medicine, Albert Einstein College of Medicine, Bronx, New York, United States of America, Division of Medical Virology, Department of Clinical Laboratory Science, Albert Einstein College of Medicine, Bronx, New York, United States of America

William Jacobs Jr

Affiliation Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, New York, United States of America

Enid Shephard

Affiliations Institute of Infectious Disease and Molecular Medicine, Albert Einstein College of Medicine, Bronx, New York, United States of America, Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa, Medical Research Council, Cape Town, South Africa

Anna-Lise Williamson

Affiliations Institute of Infectious Disease and Molecular Medicine, Albert Einstein College of Medicine, Bronx, New York, United States of America, Division of Medical Virology, Department of Clinical Laboratory Science, Albert Einstein College of Medicine, Bronx, New York, United States of America, National Health Laboratory Service, Cape Town, South Africa

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: RC HS ES A-LW. Performed the experiments: RC HS. Analyzed the data: RC HS ES A-LW. Contributed reagents/materials/analysis tools: RC HS WJ ES A-LW. Wrote the paper: RC ES A-LW.