This resulted in a seventy five per cent reduction in the number of contact centres.

这导致联络中心减少了75%。

And the Biden campaign actually has announced a plan to do that by increasing the number of contact tracers, by starting up a national testing board with the ability and the resources to ramp up testing.

拜登竞选团队实际上已经宣布了一项计划， 通过增加接触者追踪器的数量，启动一个具有能力和资源来加强测试的国家测试委员会来实现这一目标。