herd

Many took advantage of the policy, leaving the children in his practice well below the 95% threshold that experts say is needed to achieve herd immunity.

“But what we’re seeing was this herd of elk, locked up, having massive die outs. We had severe water pollution, some of the worst water pollution in California.”

Public health experts say a 95% vaccination rate, sometimes called “herd immunity,” is generally considered the gold standard of disease prevention.

A 95% vaccination rate, sometimes called “herd immunity,” is generally considered the gold standard of disease prevention.

Scientists are sounding alarms about a genetic mutation that was recently identified in four dairy cow herds, nearly one year after H5N1 bird flu was first reported in Texas dairy cattle.