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Follow these scientists working to get us safe and effective Covid vaccines. Ask them anything.

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Featured Guides

These volunteers are making short videos on TikTok and Instagram to explain their part in the vaccine effort.


Dr Ahmad Abou Tayoun

Ahmad is the Director of the Genomics Center at Al Jalila Children’s Specialty Hospital and an Associate Professor of Genetics at Mohammed Bin Rashid University of Medicine and Health Sciences in the United Arab Emirates. Ahmad is a leading figure in driving efforts to characterize the epidemiological and genomic characteristics of SARS-CoV-2, identify host genetics factors and RNA expression profiles modulating COVID-19 disease severity in the UAE. 


Dr Ayede Ologun

Dr Ayede Ologun is a General Practitioner in Manchester, England. Her day to day consulting has been largely influenced by the pandemic and roll out of the vaccine, answering questions and addressing concerns regarding the vaccines and being trained in vaccine delivery. 

Ayede is a Clinical Supervisor and an OSCE Examiner. She sits on the Royal College of General Practitioner North West Faculty Board as the Treasurer and Lead on Mid-Career GPs. She is the General Secretary of Black Women in Health, UK. She is a motivational speaker and a Life Coach.

Outside work, Ayede is a Life coach, coaching women on embracing their authenticity so they can be their best selves and give their best to others. Ayede also speaks at medical events and gives motivational talks. She loves watching Korean dramas and listening to Korean music artists (BTS and Blackpink). She also likes travelling to new places, trying new dishes and cultures, gardening when she can and most importantly, spending time with her family. 


Dr Walid Zaher

Dr Walid Zaher is the Study Director of 4Humanity clinical trials and Chief Research Director G42 Healthcare. As study director of #4Humanity, the world’s first phase III clinical trials of inactivated vaccine for COVID-19, Dr Walid has a unique vantage point from where he will be sharing his personal experiences and updates to keep the world informed on developments from the UAE and partnering trials nations; Bahrain, Jordan and Egypt.

Dr Walid is also an adjunct Associate professor at the College of Medicine and Health Sciences at United Arab Emirates University, with more than 30 ISI publications in reputed journals including Nature and Stem Cells. Dr Walid’s previous posts include Corporate Group Clinical Research & Innovation Director at Abu Dhabi Health Services Company (SEHA). He was also the General Director of the College of Medicine Research centers at King Saud University (Riyadh, Saudi Arabia), a consultant for the Saudi 2020 national biotechnology and infectious disease plan, and an assistant professor of regenerative medicine and stem cells. 

Dr Walid graduated with MBBS from Saudi Arabia with a residency training in Obstetrics and Gynaecology, followed by Master degrees in Medical education, Anatomy, Embryology and Bioscience technology. He holds a PhD in regenerative Medicine from Denmark, and has 1.5 yrs of laser-medicine training attachment at Harvard-MGH (Boston-USA). He has been a recipient of prestigious awards such as the King Saud University Research Prize Award for Outstanding research, King Saud University, Riyadh, KSA (2017).


Dr Paul F. McKay

Dr Paul F. McKay is a Senior Fellow at Imperial College in London who designed, made and tested Imperial’s self-amplifying RNA Covid-19 vaccine. Paul has worked in the vaccine development field for almost 30 years, completing his PhD at Imperial College and postdoctoral training at Harvard Medical School. His focus is studying the immune response to vaccine candidates, aiming to enhance or tailor the immunity to increase vaccine efficacy and creating new vaccines to various infectious diseases.


André Báfica

André Báfica is coordinating Rede IMUNOVIDa, a network researching new strategies for the development of a Covid-19 vaccine.

André is an Associate Professor of Immunology at Federal University of Santa Catarina and Director for the South Region of the Brazilian Society for Immunology, where he carries out several innovative projects and runs a research group focused on understanding the mechanisms involved in the pathogenesis of diseases, such as tuberculosis.

André has a PhD in Human Pathology from Fundação Oswaldo Cruz (CPqGM) and a post-doctorate in Immunology from the National Institutes of Health, USA. 


Shamaila Anwar

Shamalia is currently project managing the National Institute of Health Research ‘COVID and Me’ programme to address inclusivity in vaccine research and reaching underserved communities.

Dr Shamaila Anwar is a senior manager at the National Institute for Health Research where she has worked for the last 6 years managing key initiatives in Cancer, Surgery and Oral and Dental Health Research.

Shamaila completed her PhD in epidemiology at the University of Bradford and has a background in the development and management of clinical trials across a number of different specialty areas.  


Dr Jamie Parker

Dr Jamie W R Parker MBBChir MRCGP MA (Cantab) is a General Practitioner (GP) based in Nottingham and working in the NHS, helping deliver the Covid-19 vaccines to his patients.

Jamie has been a Senior GP for 10 years, he trained at Cambridge University, and became a fully qualified GP through the Nottingham Vocational Training scheme, in 2010. 

On the first day of lockdown, March 2020, Jamie wrote and performed a cover of Disney’s Frozen hit “Let it Go”, “Stay at Home” on his Twitter account. He did this to try and help publicise the importance of the ‘stay at home’ message and social distancing in preventing the spread of the coronavirus. The song went viral, and before he knew it, he was on local and national TV and radio, including Sky News, The Chris Evans Breakfast Show and BBC1, being dubbed ‘Nottingham’s singing doctor’. Jamie has since become a regular GP sofa guest on the BBC breakfast show, appearing weekly throughout the pandemic, trying to spread important messages in a calm and measured way.

Jamie lives with his family and three children in Nottingham, and loves the outdoors, sport, and music.


Dr Omon Imohi

Dr. Omon Imohi Md MRCGP DFSRH is a multiple award-winning NHS Family physician. She is involved in supporting the roll out of the Covid-19 vaccine and has been raising awareness around the vaccine to educate people on it’s importance, and to empower them to make informed decisions.

Omon attained her first degree at Windsor University School of Medicine (MD). She is a member of the Royal College of General Practitioners UK (MRCGP) and a Diplomate of the Faculty of Sexual and Reproductive Health (DFSRH). She is an Elected council member of the Royal College of General Practitioners. She is also a GP community tutor for Liverpool University.  

Omon is the founder of BWIH (Black Women in Health) a non-profit organisation born out of the need to connect, inspire, empower, and celebrate black women in healthcare in the UK. She was recently featured in the spring edition of the RCGP frontline magazine. Also featured in the September 2020 edition of the Royal College of Physician Magazine. She was awarded GP of the year 2019 by the Royal College of General Practitioners North West Faculty and won multiple audit awards, which have been published in the NICE guidelines as shared learnings. 

Omon is a self-starter with motivation, commitment, and drive to inspire and empower people to transform their lives by unleashing their maximum potential and achieving their dreams. She is a transformational speaker, a certified Life coach, Author and wife with 2 kids. 



Follow the people working on all aspects of science that will make these coronavirus vaccines safe and effective


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Dr Tim Mastro


Debasis Nayak


Gayatree Mishra


Antoine Flahault


Melvin George


You can help too

Thousands of volunteers around the world are signing up to help trial these vaccines to make sure they’re safe and effective.

Find a trial near you


Team Halo is an effort to support and celebrate the inspiring collaboration between scientists all over the world to help us end this pandemic with safe and effective vaccines.

The ‘halo’ represents the ring of connected science that circles the globe.

All participation is voluntary. If you’re involved in the vaccine search and would like to be listed on this site, please get in touch.

Team Halo was established in partnership with the The Vaccine Confidence Project at the University of London’s school of Hygiene and Tropical Medicine. It is proud to collaborate with the UN Verified Initiative and Gavi, the Vaccine Alliance. Support is provided by Luminate, IKEA Foundation and the Global Challenges Foundation.