27 March 2024

hVIVO plc

("hVIVO", the "Company" or the "Group")

Notice of results

hVIVO plc (AIM & Euronext: HVO), a rapidly growing specialist contract research organisation (CRO) and world leader in testing infectious and respiratory disease products using human challenge clinical trials, announces that it will release its full year results for the twelve months ended 31 December 2023 on Tuesday 9 April 2024.

Analyst briefing

A briefing open to equity research analysts will take place on Tuesday 9 April 2024 at 12.00 pm BST. To register and for more details please contact Walbrook PR on hvivo@walbrookpr.com.

Investor presentation

Yamin 'Mo' Khan, Chief Executive Officer, and Stephen Pinkerton, Chief Financial Officer, will provide a live presentation relating to the full year results via the Investor Meet Company platform on Tuesday 9 April 2024 at 6.00 pm BST.

The presentation is open to all existing and potential shareholders. Questions can be submitted pre-event via your Investor Meet Company dashboard up until 9am the day before the meeting or at any time during the live presentation.

Investors can sign up to Investor Meet Company for free and add to meet hVIVO here. Investors who already follow hVIVO on the Investor Meet Company platform will automatically be invited.

For further information please contact:

Notes to Editors

About hVIVO

hVIVO plc (ticker: HVO) (formerly Open Orphan plc) is a rapidly growing specialist contract research organisation (CRO) and the world leader in testing infectious and respiratory disease vaccines and therapeutics using human challenge clinical trials. The Group provides end-to-end early clinical development services to its large, established and growing repeat client base, which includes four of the top 10 largest global biopharma companies.

The Group's fast-growing services business includes a unique portfolio of 11 human challenge models, with a number of new models under development, to test a broad range of infectious and respiratory disease products. The Group has world class challenge agent manufacturing capabilities, specialist drug development and clinical consultancy services via its Venn Life Sciences brand, and a lab offering via its hLAB brand, which includes virology, immunology biomarker and molecular testing. The Group offers additional clinical field trial services such as patient recruitment and clinical trial site services.

hVIVO runs challenge studies in London from its Whitechapel quarantine clinic, its state-of-the-art QMB clinic with its highly specialised on-site virology and immunology laboratory, and its clinic in Plumbers Row. To recruit volunteers / patients for its studies, the Group leverages its unique clinical trial recruitment capability via its FluCamp volunteer screening facilities in London and Manchester.