Quit-smoking action plan
Learning Center
102 Results
Different types of COVID-19 vaccines: How they work
Find out how different COVID-19 vaccines cause your body to create antibodies that will fight the COVID-19 virus.
Article
Male masturbation: Does frequency affect male fertility?
Male masturbation has little effect on sperm count or quality.
Answer
Refine Your Search
Type
Gender
Age
- All
- 45 to 64 middle
- 19 to 44 younger
- 65 to 80 older
- 80 and over
- 03 to 5 years preschool
- 06 to 12 years elementary/preteen
- 16 years
- 13 to 18 years teen
- 02 months to 2 years infant/toddler
- 18 years
- 17 years
- 14 years
- 00 birth to 01 month newborn
Focus
- All
- Causal Risk Factor
- Prevention