All vaccines can produce side effects, mostly mild, in some people. You will find full details in the information sheet you receive with your consent form.

Yes, you can withdraw at any time, without giving a reason. All you have to do is talk to a member of the trial team.

The information collected will be confidentially and carefully stored by CVD-Mali and WHO and will not be shared with anyone outside the study team.

If you feel unwell at any time, please tell a member of the trial team.

It depends on the vaccine. Most require only one or two doses.

A handful of participants may need to have a blood sample taken before vaccination and then at different intervals after vaccination. This will help researchers understand a number of parameters, including how your body reacts to the vaccine. If you have any COVID-19-like symptoms, you will be tested.