Ireland, G., Jeffery-Smith, A., Zambon, M., Hoschler, K., Harris, R., Poh, J., Baawuah, F., Beckmann, J., Okike, I. O., Ahmad, S., Garstang, J., Brent, A. J., Brent, B., Aiano, F., Amin-Chowdhury, Z., Letley, L., Jones, S. E. I., Kall, M., Patel, M., Gopal, R., Borrow, R., Linley, E., Amirthalingam, G., Brown, K. E., Ramsay, M. E., & Ladhani, S. N. (2021). antibody persistence and neutralising activity in primary school students and staff: Prospective active surveillance, June to December 2020, England. EClinicalMedicine, 41, . http://access.bl.uk/ark:/81055/vdc_100146342852.0x000001