The first reaction to covid-19 was to stay at home to avoid rapid spread. Now people are venturing out and are looking for ways to reduce the risk. Wearing masks, social distancing, washing hands, all help. This book offers another way: Maximizing natural melatonin and taking melatonin by mouth. We examine the evidence that melatonin may increase immunity to the virus as it does in young children who make large amounts of natural melatonin. It may also reduce the severity of the infection. Exposing the eyes to light in the hours before bedtime stops the body from making melatonin. Wearing orange glasses allows production of melatonin. Go to our for glasses. Wearing the glasses for 3 - 4 hours before a 7 to 8 hour sleep in darkness will maximize natural melatonin. Taking a 2 - 5mg melatonin tablet when you put on the glasses will avoid disturbing your circadian rhythm. Natural melatonin is injected directly into the brain where it can protect the brain from the virus. Melatonin has been shown to be very safe, even in very larger doses. Dr. Hansler, the author, did research for GE Lighting for 43 years before retiring to John Carroll University where he studied the effect of light on sleep and health. He has written 9 other books about this.