Swarms of deadly hornets have killed more than 40 people and injured more than 1,600 in northern China. At least 37 patients are in a critical or serious condition in hospitals, according to Shaanxi provincial government. Victims of the attack have been left with deep, dark craters in their skin the size of bullet wounds. … The Chinese term for hornets is “hu feng” and local experts believe the culprit is the Asian giant hornet or Vespa mandarinia, which grows up to 5 cm (2 in) long with a 6-mm (¼-in) sting. The insects’ highly toxic stings can lead to...