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Can blood from coronavirus survivors treat the newly ill?

Hospitals are gearing up to test if a century-old treatment used to fight off flu and measles outbreaks in the days before vaccines, and tried more recently against SARS and Ebola, just might work for COVID-19, too: using blood donated from patients who’ve recovered.

China’s skies are briefly clearer while factories stay shut

China’s far-reaching efforts to control the spread of the new coronavirus have shuttered factories, emptied airports and resulted in a steep drop in carbon emissions and other pollutants. However, analysts caution that the dip in pollution is likely temporary.

How a small stretch of ocean stirred a conservation movement

Following the lead of the U.S., other nations have designated marine sanctuaries and protected areas, which now cover about 6% of the world’s oceans — a bonanza for researchers but, more importantly, an important tool for safeguarding the seas.