Experts create ‘chatbot’ to address people’s concerns about Covid-19 vaccines

Wednesday, 21 April 2021

A team of experts are hoping to support members of the public who are hesitant about having a Covid-19 vaccination, and have developed an innovative new website to answer people’s questions and concerns. launches today (21 April).

Some estimates suggest that over 90% of the UK population need to take a Covid-19 vaccine to achieve herd immunity, but research from the University of Nottingham suggests that one in five British adults are uncertain about whether to have a vaccine.

The recent news about the risk of rare blood clots and the Astra-Zeneca vaccine have undoubtedly amplified people’s concerns.

Researchers at the University of Nottingham have been looking at the reasons why people are unsure and have found that most people have very similar worries.

A team of experts from the Universities of Nottingham, Southampton, Kings College London, and NIHR ARC Wessex, and led by Professor Kavita Vedhara from the School of Medicine at Nottingham, sought to answer these questions, by gathering information and evidence from independent experts working in the areas of immunology, vaccines and Covid-19.


Professor Kavita Vedhara

Professor Kavita Vedhara said: “There is a lot of information and misinformation about Covid-19 vaccines and it can be hard to know where to look and who to trust. We have tried to develop a 'one-stop shop' that will provide information about the most common issues raised by the UK public. Our aim is to give people the information that will help them make an informed choice. Having a Covid-19 vaccine is a choice and everyone deserves a chance to have access to the information that will help them make that choice.”

Working with creative technology agency Rehab, the team have developed a website - - which they hope will help support people in making their decisions about having a vaccine.

The website provides up to date information on what we do and don’t know about the vaccines and allows people to explore the specific questions or concerns that matter to them. For example, the website includes information on the blood clot issue and also whether people can be vaccinated during Ramadan. The website was developed using research carried out and the University of Nottingham. It also provides links to other websites, that the public may find helpful.

The ‘chatbot’ starts by asking the user a few questions to find out what they are most concerned about. It then has a ‘conversation’ with the user about this issue in an objective, non-judgemental way, talking them through what is known and what isn’t, with scientific evidence presented in an accessible way.

The chatbot is able to store anonymous information on how the website is used which will help the team to understand which parts of the site work well and are used the most. This will allow them to continuously improve the site. The team are also hoping to secure funding to enable the site to be translated into different languages.

Vaccine roll-out is making a real difference in reducing the number of Covid-19 cases, so much so that a Covid-free future here in the UK is a real possibility. However, to achieve that we need as many people who are eligible to receive the vaccine to go and get the jab. Yes, people have real concerns about the vaccine and there is a lot of misinformation out there. That's why this website is so important as it acts as a one-stop shop to answer those burning questions about Covid vaccine safety.”
Jonathan Ball, Professor of Molecular Virology in the School of Life Sciences at the University of Nottingham, is one of the researchers who has helped to develop the content of the website

The project comes out of a three-year partnership between Rehab and the University of Nottingham focusing on digital interventions. A previous study from the University identified 10 key topics in people’s hesitancy that must be addressed, and, with NHS resources too stretched to handle the number of conversations needed - Rehab have stepped in to provide a solution. Rehab have plans to expand on the project and build more direct intervention tools

Rob Bennett, CEO of Rehab Agency, said: “Digital technology, and social media in particular, contribute to the vaccine hesitancy issue, so it’s vital that we consider how we can make technology a part of the solution and work for society - rather than against it. The potential of conversational interfaces has advanced tremendously in recent years, and this project hopes to spotlight how pivotal they can be in fighting on the right side of important battles. Rehab is always looking at the endless possibilities of how technology can help people, and we’re very pleased to bring this project to the public.”

The website is free to use and available at

Story credits

More information is available from Professor Kavita Vedhara at

Charlotte Anscombe - Media Relations Manager - Faculty of Medicine and Health Sciences
Phone: 0115 748 4417

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