Hilary Simons1, Dipti Patel2. 1. National Travel Health Network and Centre (NaTHNaC), UCLH NHS Foundation Trust, 3rd Floor Central, 250 Euston Road, London NW1 2PG, UK. 2. National Travel Health Network and Centre (NaTHNaC), UCLH NHS Foundation Trust, 3rd Floor Central, 250 Euston Road, London NW1 2PG, UK. Electronic address: dipti.patel9@nhs.net.