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South African women in masks walking down dirt road.

True toll of coronavirus on sub-Saharan Africa may be obscured by tremendous variability in risk factors and surveillance

February 17, 2021 ・ Morgan Kelly

One early feature of reporting on the coronavirus pandemic was the perception that sub-Saharan Africa was largely being spared the skyrocketing infection and death rates that were disrupting nations around the world. While still seemingly mild, the true toll of…

Adherence to health precautions, not climate, the biggest factor driving wintertime COVID-19 outbreaks

February 9, 2021 ・ Morgan Kelly

Wintertime outbreaks of COVID-19 have been largely driven by whether people adhere to control measures such as mask wearing and social distancing, according to a study published Feb. 8 in Nature Communications by Princeton University researchers. Climate and population immunity…

Large, delayed outbreaks of endemic diseases possible following COVID-19 controls

November 9, 2020

Measures to reduce the spread of COVID-19 through non-pharmaceutical interventions (NPIs) such as mask wearing and social distancing are a key tool in combatting the impact of the ongoing coronavirus pandemic. These actions also have greatly reduced incidence of many…

Largest COVID-19 contact-tracing study to date finds children key to spread, evidence of superspreaders

September 30, 2020 ・ Morgan Kelly

A study of more than a half-million people in India who were exposed to the novel coronavirus SARS-CoV-2 suggests that the virus’ continued spread is driven by only a small percentage of those who become infected. Furthermore, children and young…

Long-term COVID-19 containment will be shaped by strength and duration of natural, vaccine-induced immunity

September 21, 2020

New research suggests that the impact of natural and vaccine-induced immunity will be key factors in shaping the future trajectory of the global coronavirus pandemic, known as COVID-19. In particular, a vaccine capable of eliciting a strong immune response could…

Local climate unlikely to drive the early COVID-19 pandemic

May 18, 2020 ・ Morgan Kelly

Local variations in climate are not likely to dominate the first wave of the COVID-19 pandemic, according to a Princeton University study published May 18 in the journal Science. The researchers found that the vast number of people still vulnerable…

COVID-19′s silent spread: How symptomless transmission helps pathogens thrive

May 14, 2020 ・ Catherine Zandonella

COVID-19′s rapid spread throughout the world has been fueled in part by the virus’ ability to be transmitted by people who are not showing symptoms of infection. Now, a study by researchers at Princeton has found that this silent phase…

Princeton researchers map rural U.S. counties most vulnerable to COVID-19

April 15, 2020 ・ Morgan Kelly

A county-by-county analysis of the United States by Princeton University researchers suggests that rural counties with high populations of people over 60 and limited access to health care facilities could eventually be among the hardest hit by the coronavirus pandemic…

Climate change could make RSV respiratory infection outbreaks less severe, more common

December 16, 2019 ・ Morgan Kelly

One of the first studies to examine the effect of climate change on diseases such as influenza that are transmitted directly from person to person has found that higher temperatures and increased rainfall could make outbreaks less severe but more…