What is the most common symptom of an std?
warts
painful urination
nothing; asymptomatic

The germs that cause infections are mainly spread in what three ways? a. immunization, mucous membranes, not washing hands b. germ-laden droplets, direct contact with body fluids, insects c. hand hygiene, sickness, immunization d. not enough sleep, low oral hygiene, germs

The outermost layer of your teeth is called the enamel and is made of?

Based on the chart, what are the three most effective methods to protect against pregnancy?