About the Authors

Kathryn Stinson

kathryn.stinson@uct.ac.za

Affiliation Centre for Infectious Disease Epidemiology and Research, School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa

Karen Jennings

Affiliation Specialised Health, City Health Directorate, Cape Town, South Africa

Landon Myer

Affiliation Centre for Infectious Disease Epidemiology and Research, School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa

Competing Interests

Co-author Landon Myer is an editor for PLOS ONE. The authors confirm that this does not alter their adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: KS KJ LM. Analyzed the data: KS LM. Wrote the paper: KS LM. Review of final draft: KJ.