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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.
Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
![Evolutionary ecologists live and do research in contemporary cultures that maintain all or some aspe](https://biology-forums.com/gallery/47/medium_273688_23_02_15_8_11_15_208812369.jpeg)
![a) When leaning from a seated position, maintain a neutral spine. b) Avoid sitting with your spine ...](https://biology-forums.com/gallery/27/medium_679044_04_04_17_12_50_26_27465617.jpeg)