Isaac Makwala was blocked from entering the Stadium

Botswana's medal hope Isaac Makwala was barred from the London Stadium just hours before the 400m final after he was hit by a vomiting virus.Video footage shows the 30-year-old, who was one of the main challengers to South Africa's Wayde van Niekerk, not being allowed to enter the stadium.He had previously said he was 'heartbroken' after learning he could not compete in the 200m event on Monday, despite feeling fit enough to race.Makwala, who is a national hero in his country, had fallen victim to the sickness bug which has already struck down 30 competitors at the event in London. 🌟Cute baby oblivious to huge lion trying to get through zoo glass↪http://goo.gl/a4XwKr 🌟Shocking video captures man’s murder outside of bodega↪http://goo.gl/iz8Kr2 🌟Shocking moment man punches woman in the face in road rage attack↪http://goo.gl/cgAWmc 🌠Read more: http://ift.tt/T3uzlf.. Follow us: @MailOnline on Twitter | DailyMail on Facebook