There's no scientific definition for a wave of disease – and no evidence that the original onslaught of coronavirus in the US has receded much at all.
A simple computer model shows that safety measures can significantly impact both the exponential spread of COVID-19 and mortality rates.
Yellow fever, malaria and Ebola all spilled over from animals to humans at the edges of tropical forests. The new coronavirus is the latest zoonosis.
As most of the world early awaits a vaccine for COVID-19, a smaller group of people scoffs. They could spell real trouble in the effort to build widespread immunity.
Efforts to protect nursing home patients should include moving residents from facilities and increased testing, said Harvard epidemiologist Michael Mina.
An audio version of an in depth article on why mathematical modelling is crucial to understanding pandemics like the new coronavirus.
Social distancing could allow a level of infection that can be handled by the health care system, but would build enough immunity to strangle the epidemic.
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