Arkell, P., Gusmao, C., Sheridan, S. L., Tanesi, M. Y., Gomes, N., Oakley, T., Wapling, J., Alves, L., Kopf, S., Sarmento, N., Barreto, I. D. C., Amaral, S., Draper, A. D., Coelho, D., Guterres, H., Salles, A., Machado, F., Fancourt, N. S., Yan, J., Marr, I., Macartney, K., & Francis, J. R. (2022). serological surveillance of healthcare workers to evaluate natural infection- and vaccine-derived immunity to SARS-CoV-2 during an outbreak in Dili, Timor-Leste. International journal of infectious diseases, 119, 80–86. http://access.bl.uk/ark:/81055/vdc_100158624501.0x00000e