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As many countries start to vaccinate their populations against Covid-19, questions are being asked as to how the vaccine will be evenly distributed around the world. There have been fears that richer countries could hoard jabs at the expense of poorer ones so an international scheme called Covax aims to make sure vaccines are shared fairly among all nations. But will this work? And how long will it take for poorer countries to get the vaccine? We'll speak to an expert to answer these questions.

Also, we continue to bring together people from across the world to hear how they have been affected by the coronavirus pandemic. Today we speak to people with stammers and stutters, to hear how lockdowns and isolation has impacted their speech problems.

And, every day we are joined by a health expert to help us understand the latest news about coronavirus and to answer your questions. Today our guest is Dr Isaac Bogoch, an infectious diseases physician and scientist from the University of Toronto.

(Photo: A health worker fills a syringe with a dose of the Oxford/AstraZeneca COVID-19 vaccine in Widnes, Britain, January 14, 2021. Credit: Reuters/Jason Cairnduff)