I'm better. The tonsils and the act of swallowing are much less painful.  Nathaniel brought me an Abbott BinaxNOW Covid-19 Antigen Self-Test which I administered. It was negative. He also brought me a thermometer which needs a new battery, and a cup of tea which I swallowed without difficulty. The gastric reflux has stopped. I am retreating to trying to learn about Quantum Mechanics.