WARSAW (Reuters) - The coronavirus variant originating in Britain, known to be highly contagious, makes up more than 60% of cases in Poland and will soon reach 80%, a Polish health ministry spokesman said on Friday. Poland is grappling with the third wave of the pandemic and has seen a sharp recent spike in cases driven by the variant originating in Britain. “Today, the British mutation, makes up for about 60% (of cases) ... we are moving towards 80%,” spokesman Wojciech Andrusiewicz told a news conference.