Science

Why a Century-Old Vaccine Could Be the Next Weapon Against Viruses

In the early days of the Covid-19 pandemic, when prevention seemed light years away, several scientists launched trials to see whether a tuberculosis vaccine developed in the early 1900s might protect people by bolstering the immune system. The Bacillus-Calmette-Guerin vaccine has long been known to have broad effects on the immune system, and is still …

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Killing of Ranger Protecting Rhinos Raises Fears for Conservation Efforts

Anton Mzimba, the lead ranger at a reserve in South Africa, had received multiple death threats. But he tried not to let the warnings of danger get to him, reminding himself that by protecting rhinos he was working for the greater good, according to an interview he gave last year. “What I’m doing, I’m not …

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21,000 Fish Die in ‘Catastrophic Failure’ at California Research Center

About 21,000 fish at an aquatic research center at the University of California, Davis, died from chlorine exposure in what the university described as a “catastrophic failure” that had shocked researchers and would significantly delay their studies. The university said in a statement that it would investigate “where our process failed” and initiate an independent …

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Polio Has Been Detected in New York City Wastewater, Officials Say

Polio outbreaks incited regular panics decades ago, until a vaccine was developed and the disease was largely eradicated. Then on Friday, New York City health authorities announced that they had found the virus in wastewater samples, suggesting polio was probably circulating in the city again. Parents of young children found themselves wondering — perhaps for …

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