Fears over potential fourth surge rise as White House sends warning to Covid-weary Americans

The race between increasingly available inoculations and rising infections cresting into a spring surge is — to borrow the title of the Trump administration’s original vaccine development project — now hitting warp speed.

But even a daily average of more than 2.5 million shots in arms is insufficient to stem rising cases following a spate of spring break revelry and premature state openings that will inevitably mean thousands more deaths.

Walensky, the director of the US Centers of Disease Control and Prevention, encapsulated the strange duality with a stark warning juxtaposed against a…