Govt personnel and their households at the U.S. embassy in Havana, Cuba, in late 2016 and the U.S. consulate in Guangzhou, China, in early 2017 started suffering from a array of abnormal — and in some cases suddenly occurring — indications these as a perceived loud noise, ear discomfort, powerful head tension or vibration, dizziness, visible troubles, and cognitive challenges, and numerous continue to continue on to practical experience these or other well being issues.