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.
Answered by The Community. Making the world better, one answer at a time. Within 3 days after exposure to the germ that causes strep's painful sore throat, you may get sick. Once infected with strep, you are contagious for up to 2 to 3 weeks, even without symptoms. However, taking antibiotics you will no longer spread the bacteria to others after about 24 hours.