Reuters."The latest data shows that there's around a dozen new ones, so a much, much smaller number, and each time we find a new one we absolutely clamp down on it," he said.Asked what impact the vaccine roll-out was having so far, he said there were signs that it was reducing transmission and that the numbers in hospital were falling much more sharply than they did in the first wave of the pandemic.Meanwhile, the British government says it aims to give every adult in the country a first dose of coronavirus vaccine by July 31, a month earlier than its previous target.The goal is for everyone over 50 or with an underlying health condition to get a shot by April 15, rather than the previous target of May 1.The makers of the two vaccines.