Please find the global entry criteria below. If your centre is already recruiting please refer to your protocol for eligibility requirements.

Entry criteria (Global v2.1)

Inclusion criteria

Inclusion criteria are stratified to facilitate recruitment under conditions in which resources are limited (Dunning et al. 2014). Lower tiers include syndromes with a high probability of genetic susceptibility, and will be prioritised in resource-limited settings. Higher tiers describe less-specific syndromes with a focus on mortality.

Patients will be recruited who:

Group 1: specific infectious syndromes in highly-selected patients

Emerging Infections

Emerging infections are by their nature unpredictable and present a significant challenge to the international research community. In order to ensure research preparedness, in accordance with the principles laid out by the International Severe Acute and Emerging Infection Consortium (ISARIC)(Dunning et al. 2014), patients will be recruited to this study if they have confirmed or suspected infection with a novel pathogen, a new strain of an existing pathogen, or a re-emerging known pathogen, that causes life-threatening illness. This will include the Middle East Respiratory Syndrome (MERS) and Severe Acute Respiratory Syndrome (SARS), highly pathogenic strains of influenza, Ebola virus disease and other epidemics of viral haemorrhagic fever.

Exclusion criteria

Exclusion criteria do not apply to COVID-19. All consenting COVID-19 patients will be included. For all inclusion categories apart from COVID-19, patients who are functionally limited by any comorbid illness (such as frailty, heart failure, chronic obstructive pulmonary disease (COPD), or reduced exercise tolerance of any cause) or have significant immunosuppression (such as cancer chemotherapy or acquired immune deficiency syndrome) will be excluded from this study.