Helen Jeffers

Safety and efficacy of the ChAdOx1 nCoV-19 vaccine (AZD1222) against SARS-CoV-2: an interim analysis of four randomised controlled trials in Brazil, South Africa, and the UK

Merryn Voysey, Sue Ann Costa Clemens, Shabir A. Madhi et al. · The Lancet · 2020 · 5K citations · Full text

Veterinary Medicine, Infectious Diseases, Preventive Medicine +17

Single-dose administration and the influence of the timing of the booster dose on immunogenicity and efficacy of ChAdOx1 nCoV-19 (AZD1222) vaccine: a pooled analysis of four randomised trials

Merryn Voysey, Sue Ann Costa Clemens, Shabir A. Madhi et al. · The Lancet · 2021 · 1.2K citations · Full text

Veterinary Medicine, Immunology, Immunization +16

Inhaled budesonide in the treatment of early COVID-19 (STOIC): a phase 2, open-label, randomised controlled trial

Sanjay Ramakrishnan, Dan V. Nicolau, Beverly Langford et al. · The Lancet Respiratory Medicine · 2021 · 434 citations · Full text

Pharmacy, Clinical Sciences, Pharmacotherapy +13

Predictive value of blood eosinophils and exhaled nitric oxide in adults with mild asthma: a prespecified subgroup analysis of an open-label, parallel-group, randomised controlled trial

Ian Pavord, Mark Holliday, Helen K. Reddel et al. · The Lancet Respiratory Medicine · 2020 · 116 citations · Full text

Life Sciences, Immunology, Internal Medicine +16

Blood eosinophil-guided oral prednisolone for COPD exacerbations in primary care in the UK (STARR2): a non-inferiority, multicentre, double-blind, placebo-controlled, randomised controlled trial

Sanjay Ramakrishnan, Helen Jeffers, B Langford-Wiley et al. · The Lancet Respiratory Medicine · 2023 · 72 citations · Full text

Medicine, Internal Medicine, Pharmacotherapy +17