Zinc oxide is a powdered mineral that sits on top of the skin, scattering, reflecting, and absorbing UVA & UVB rays. Although zinc oxide is the safest and most effective active sunscreen ingredient, the best protection from the sun is to seek shade and cover up with clothes and a hat.
Story at-a-glance 1  -. With immediate and antibiotic-free treatment, strep throat can improve in two to five days, up to a week. 2  Immediate treatment of strep throat is very crucial not just for quick recovery, but because an untreated case of strep throat can lead to further complications.
Strep throat is caused by streptococcal bacteria (strep) in the throat and often the tonsils. Symptoms include sudden severe sore throat, pain swallowing, a fever over 101oF, swollen tonsils and lymph nodes, and white or yellow spots or a reddened back of the throat. Strep throat is highly contagious, with a two-to-five day incubation period.