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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.


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. 


Leticia Monin

Leticia Monin is a Postdoctoral Research Fellow at the Francis Crick Institute, in London. Her research focuses on the development of the immune system and immune mechanisms controlling diseases (including Covid-19) at mucosal sites. Leticia is originally from Uruguay, where she studied for her BSc in Biochemistry and her MSc in Molecular and Cell Biology. She then moved to the University of Pittsburgh, USA, where she received her PhD in Immunology.  

At the onset of the pandemic, Leticia and many of her colleagues reoriented their work to contribute to the understanding of Covid-19. Specifically, she has been involved in studies geared at understanding the differences in the immune response in people affected with severe vs. mild/asymptomatic Covid-19. More recently, she has participated in studies to characterise the response to both infection and SARS-CoV-2 vaccination in cancer patients.

Leticia loves the outdoors and being active (particularly HIIT and yoga). She is also an avid reader and has a strange fascination with horror films. She is fluent in English, Spanish, French, Italian and Catalan.


Dr Alex Bowmer

Dr Alex Bowmer is a medical anthropologist and a Research Fellow at the London School of Hygiene and Tropical Medicine, working on understanding the social dynamics of epidemics and the facilitators and barriers to vaccine deployment in epidemic outbreaks. After completing his PhD, he has spent the past two years working on Ebola, Rift Valley Fever, Swine Fever, and now Covid-19. 

Outside of his work on Covid-19, he also works in professional sport as a physical therapist and strength & conditioning coach with teams in the USA and UK. 


Jaqueline Goes de Jesus

Jaqueline Goes de Jesus is a biomedical scientist, in charge of the genetic sequencing of the new coronavirus in the first cases of Covid-19 in Latin America. She is currently working as a fellow at The São Paulo Research Foundation (FAPESP), as part of her post-doctorate at the São Paulo Institute of Tropical Medicine – University of São Paulo (IMT-USP), within the Brazil-UK Centre for Arbovirus Discovery, Diagnosis, Genomics and Epidemiology (CADDE). Jaqueline also carries out research in the field of the following emerging arboviruses: ZIKV, DENV, CHIKV, YFV, ORV and MAYV.


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)’.


Dr Will Budd

Will is a Clinical Research Physician at Imperial College London. After graduating this year in medicine, Will had to shield for most of the first wave of the coronavirus because of a Renal Transplant he received in 2016. Instead of working on the hospital wards he is running vaccine trials, assessing eligibility, vaccinating participants and following them up. The facility he works in is trialling both the Oxford and Imperial Covid vaccine candidates.


Professor Shiv Pillai

Shiv is Professor of Medicine and Health Sciences & Technology at Harvard Medical School where he’s Director of the immunology postgraduate programmes, and a Group leader at the Ragon Institute of MGH, MIT and Harvard, where his lab is located. He is a world leader in the study of fundamental B-cell development. Currently his lab is studying the immune response to Covid-19, where they have identified a potential way in which the disease’s cytokine storm may inhibit development of a strong antibody response by the immune system.


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.



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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.