Vitamin D as a treatment for coronavirus could cut deaths by 60% a new study has found.An MP called for hospitals to start using it as a Covid-19 remedy "immediately" after research conducted in Spain.It looked at the effectiveness of using calcifediol - a Vitamin D3 - when treating more than 550 people on coronavirus wards of the Hospital del Mar in Barcelona, Spain.Those who took part in the trial, the results of which were published in the Social Science Research Network, were randomly assigned as either recipients of the calcifediol treatment or as controls on admission.The patients received five doses of the vitamin in increasing intervals of two, four, eight and 15 days.The results show that Covid-19 patients given the Vitamin D doses.