As you might think, bacterial infections are caused by bacteria, and viral infections are caused by viruses. Perhaps the most important distinction between bacteria and viruses is that antibiotic drugs usually kill bacteria, but they aren't effective against viruses.iruses. Viruses are even smaller than bacteria and require living hosts â such as people, plants or animals â to multiply. Otherwise, they can't survive. When a virus enters your body, it invades some of your cells and takes over the cell machinery, redirecting it to produce the virus.
Some seizures may place temporary but severe stress on the body and cause problems with the muscles, lungs, or heart. Choking, an abnormal heartbeat, or other problems may cause sudden death, though this is rare. Untreated seizures that become more severe or frequent may lead to these problems.
Seizures, or convulsions, occur when abnormal signals from the brain change the way the body functions. Seizures are different from person to person. Some people have only slight shaking of a hand and do not lose consciousness. Other people may become unconscious and have violent shaking of the entire body. Shaking of the body, either mild or violent, does not always occur with seizures.