@article{Marcato_Fielding_Crooks_Massey_Le_Bergeri_McVernon_2022, title={The ongoing value of first few X studies for COVID-19 in the Western Pacific Region: FFX studies for COVID-19}, volume={13}, url={https://ojs.wpro.who.int/ojs/index.php/wpsar/article/view/873}, DOI={10.5365/wpsar.2022.13.1.873}, abstractNote={<div><span lang="EN-AU">First few ‘X’ (FFX) studies for COVID-19 involve data collection from confirmed cases and their close contacts. They remain relevant especially as many remain susceptible to infection, and as they can </span><span style="font-size: 0.875rem;">provide detailed insight into vaccine effectiveness and the epidemiology of variants of concern, helping to inform a proportionate health response.</span></div>}, number={1}, journal={Western Pacific Surveillance and Response}, author={Marcato, Adrian and Fielding, James E and Crooks, Kristy and Massey, Peter D and Le, Linh-Vi and Bergeri, Isabel and McVernon, Jodie}, year={2022}, month={Mar.}, pages={3} }