It’s possible that the spread of an infection will eventually stabilise at a constant level so that it becomes present in communities at all times, possibly at a relatively low, sometimes predictable rate.
A test that can diagnose Covid-19 in minutes will dramatically expand the capacity to detect cases in low- and middle-income countries, the World Health Organization (WHO) has said.
The $5 (£3.80) test could transform tracking of Covid-19 in less wealthy countries, which have shortages of healthcare workers and laboratories.
In the race to develop a vaccine for the coronavirus, one deadline has been defined with a precision that, if not scientific, has the clarity of an equation: the first Tuesday in November. Throughout the fall, Donald Trump has frequently intimated that a vaccine might be approved before the election. The President may turn out to be correct, although the product that’s most likely to beat November 3rd is called Xinxing Guanzhuang Bingdu Miehuo Yimiao