But infectious bacteria can make you ill. They reproduce quickly in your body. Many give off chemicals called toxins, which can damage tissue and make you sick. Examples of bacteria that cause infections include Streptococcus, Staphylococcus, and E. coli.
Getty Images/Fuse. Head down: Jet lag symptoms include feeling sleepy during the day in your new time zone. Jet lag is what we call it when your body is reacting to these changes in your environment, which is basically your body taking time to adjust to its new place and time. Symptoms include feeling sleepy during the day in your new time zone, but also having a troubled sleep at night.
The effects of jet lag usually are greater if you are going from west to east than from east to west. The symptoms of jet lag may take one to several days to go away. When you fly east, the number of days it takes to recover from jet lag will be about two-thirds the number of time zones you cross. For example, if you cross six time zones, it will take you about 4 days to get back to normal.