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Featured Guides

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


Christina Kim

Christina is an oncology nurse practitioner with a background in biochemistry. She has been a nurse practitioner at the Massachusetts General Hospital for 11 years in both acute care and ambulatory settings. She carries a strong background in basic molecular and cell biology, as well as the care of acutely ill patients in a large academic medical center.

Christina actively manages the clinical care of high risk cancer patients in her day to day job. She has a vested interest in ensuring her vulnerable patients are educated in the safety and efficacy of COVID-19 vaccines. She also regularly works in the monoclonal antibody clinic where she administers these therapies to high risk COVID-19 positive patients.

Christina is a mother of two young kids, ages 2 and 4, and is married to her wonderfully supportive husband, Dave. She enjoys anything related to true crime, cooking/baking competition shows, and CrossFit (when she has time!). She takes great pride in being a first generation Korean-American, and is passionate about racial justice issues.


Dr Kiran Morjaria

Dr Kiran Morjaria is a junior doctor and comedian based in Manchester. He is working on the front line admitting and treating patients with Covid-19. In his spare time he volunteers at a Covid-19 vaccination hub as a vaccinator.

Kiran graduated from Leeds Medical School in 2017, where he was awarded the SPARK scholarship for enterprise, and is currently training to be a GP. He has performed comedy across the national circuit and continues to make medicine accessible and fun online.

Kiran’s big passion outside of medicine is comedy. He also enjoys staying active, he is a keen gym-goer, tennis player and vegetarian foodie.


Dr Paul Ian Cross

Dr Paul Ian Cross is a subject matter expert in clinical trials. Paul leads on the development of learning materials for healthcare professionals involved in Covid19 research and is also a clinical trials auditor. Paul’s passion is writing STEM (science, technology, engineering, mathematics) inspired books to introduce children to the wonders of science. During 2020, Paul worked as a science communicator, focusing on vaccine development. He has since written a nonfiction book for children aged 8-12 entitled How To Vanquish A Virus, published by Welbeck Children’s Books.


Björn Meyer

Björn Meyer, originally from Germany, is a virologist working in the Viral Populations and Pathogenesis Unit at the Institut Pasteur in Paris, France. 

Since the Covid-19 pandemic began, his research has focused on SARS-CoV-2 infected cells and what happens between cellular and viral proteins. Björn uses these interactions as starting points to target events for antiviral strategies specifically. He is also part of a therapeutic task force that develops assays and drug-screens to test new therapeutics (small molecules, biologics, antibodies, etc.) from academic and industrial partners. 
Outside of work, Björn makes the most of living in France — enjoying food and wine with his partner Kerri. 



Dr Beachgem10 is a Paediatric emergency medicine physician with a niche in disaster preparedness. She has publications related to Kawasaki Disease and Asthma management in kids.

As an emergency medicine doctor, she has learned how to break down complicated information into terms people can easily understand, making higher level research publications accessible to anyone. Seeing COVID-19 in patients daily, she feels strongly that the COVID-19 vaccines will prevent kids from suffering. 

She is a mom to four kids and is constantly working to balance her time between her passion for her work and for her family. Her husband has been at her side throughout her education and is now the ringmaster of the family circus! 


Dr Anita Raja

Dr Anita Raja is a NHS General Practitioner based in Birmingham, but born and bred in Germany to a Persian mum and Pakistani father. She is a vaccinator for the Covid-19 vaccine effort in the UK and is actively involved in awareness raising around Covid-19 in Urdu. 

Anita is multilingual, speaking Urdu, Persian, and German. She is also an ex-TV anchor for Pakistan Television. Anita is passionate about health awareness, especially in BAME communities, and empowering people by giving them the right information.

Outside of work, Anita is mum to Nirvan and Rumi, enjoys Turkish and Persian cuisines,  loves House/Electronic music and reading books.


Dr Gustavo Cabral

Gustavo leads the team that is developing a Brazilian vaccine for Covid-19 at the University of Sao Paulo. His work also focuses on vaccines for the Chikungunya and Zika viruses. His research centres on the use of “virus-like particles”, which was the focus of his postdoctoral studies at the universities of Oxford in the UK and Bern in Switzerland.


Juan Ambrosioni

Juan Ambrosioni MD, PhD is a specialist for the HIV / AIDS Unit and Infectious Disease Service and Assistant Professor of Medicine at the University of Barcelona. He is also an infectious disease specialist for the University of Buenos Aires, Argentina and the University of Geneva, Switzerland. Juan is involved in the Infectious Disease Service of Hospital Clinic-IDIBAPS, which runs the SARS-CoV2 vaccine project ‘Development of innovative coformulated mRNA vaccine against SARS-CoV2 (Cova-RNA)’.



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


Dr Vedantha Srinivas J


Robin Shattock


Mariet Feltkamp


Sheuli Porkess


Ritudhwaj Tiwari


Jason Kindrachuk


Otavio Ranzani


Sandeep Panigrahi


Prof Katie Ewer


Dr Tim Mastro


Michael Mina


Victor M. Corman


Heidi Larson


The Vaccine Confidence Project


Elisa Ramos Sevillano


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 as part of the United Nations Verified Initiative in partnership with The Vaccine Confidence Project at the University of London’s School of Hygiene and Tropical Medicine. It is proud to collaborate with the Vaccine Alliance and GAVI. Support is provided by Luminate and IKEA Foundation.