The R number fluctuates more as case numbers fall.
To control the COVID-19 pandemic through random testing would require about 6.5 million test a day. Using group testing and machine learning could get that number down to fewer than 40,000 day.
Daily deaths from COVID-19 have rarely been below 600 in the U.S. since March.
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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.
By setting out the continent’s research priorities, scientists can focus better on what needs to be done.
Some of the priorities were drawn from the World Health Organisation's Roadmap; others were expressed by researchers in and from Africa as being important to the continent's many contexts.
Hospital and nursing staff wear face masks and observes social distancing guidelines at an event in the U.K.
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A simple computer model shows that safety measures can significantly impact both the exponential spread of COVID-19 and mortality rates.
Going to a protest may increase your risk of COVID-19. But calling out the structural racism that takes black lives and affects health outcomes for people of colour is also vital.
K is all about the super-spreaders.
Healthcare advancements mean we’re dying less from all kinds of disease – including cancer.
Hyejin Kang/ Shutterstock
Over a 26 year period, cancer diagnoses have risen by 22%, but deaths from cancer have decreased by an equal amount.
The UK locked down too late and has been in catch-up mode ever since. But with contact tracing, it can turn things around.
Untreated sewage could be the best tracking tool we have to prevent a second wave.
A few people in the crowd will be responsible for the bulk of a disease’s spread.
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Epidemiological data suggests that 80% of COVID-19 cases can be traced to just 20% of those infected with SARS-CoV-2.
As states open up, more coronavirus spread is expected, and models can show whether public health measures are working.
AP Photo/Mark J. Terrill
There are different types of epidemiological models. Those that rely on understanding of how disease spread are most useful now that most states have passed their peak case numbers.
An easy question, but a difficult answer.
It’s not yet clear whether antibodies in the blood of patients who have been infected with SARS-CoV-2 indicate immunity. Above: blood specimens for COVID-19 antibody tests.
(AP Photo/Mary Altaffer)
Immunity to COVID-19 may be complicated. Here are the promises and pitfalls of antibody tests.
You're heading to your first post-COVID-19 dinner party. How many guests is too many? Are hugging and handshakes OK now? And most importantly, should you bring your own cutlery?
The spread of diseases is akin to a maze of toppling dominoes.
Epidemiologists focus on diseases among groups of people. They also study the spread of disease among animals.
Women, representing nature, argue the influence of the zodiac with scholars in this undated 17th century engraving.
Fun fact: the term 'influenza' comes from the premodern belief stars influenced disease. Before epidemiologists, there were astrologers.
The US and its allies are demanding answers over how COVID-19 became a pandemic. But instead of pointing fingers at China, the inquiry should focus on scientific clues to help us thwart future disasters.
A woman walks past a graffiti by Anthony Kihoro in Kenya sensitising people about the coronavirus.
Dennis Sigwe/SOPA Images/LightRocket via Getty Images
COVID-19 differs significantly from HIV and Ebola. But the potential consequences of having a misinformed public are similar.
Bianca de Marchi/AAP Image
Test, trace, maintain social distance, and keep travel bans and quarantines in place. These measures will help Australia keep the coronavirus in check as we gradually emerge from lockdown hibernation.