A virus that infects bacteria is known as a bacteriophage, often shortened to phage. The study of viruses is known as virology, and those who study viruses are known as virologists. It has been argued extensively whether viruses are living organisms.
2 doctors agreed: 7 days: Most doctors recommend 7 days of birth control pills before having unprotected intercourse. Even with pills, there is still a 4-6% chance of pregnancy over course of a year. If miss 1 pill, take that pill immediately the next day with that days pill. If miss 2 days pills, take 3 pills and use back up method until you get your period.
How Well Does the Birth Control Shot Work? The birth control shot is a very effective method of birth control. Over the course of a year, fewer than 3 out of 100 typical couples who use the birth control shot every 3 months will have an accidental pregnancy. The chance of getting pregnant increases if a girl waits longer than 3 months to receive her next shot.