(CBS) - Young children who consistently sleep less than the recommended amount are likely to have more body fat by the age of 7. That's according to a new study, published in today's "Pediatrics." Researchers say insufficient sleep at any time in early childhood can lead to obesity later. Current guidelines recommend children up to 2 years old get at least 12 hours of sleep a day, 3 and 4 year olds should sleep for at least 10 hours. _______________________________________________________________________________________________________________________ (CBS) - Many people may think using e-cigarettes is a healthier alternative to smoking tobacco. But that may not be the case. A new study says using the devices increases exposure to drug-resistant and potentially life-threatening bacteria. California researchers say the vapors e-cigarettes emit provide a good environment for bacteria to grow. _______________________________________________________________________________________________________________________ (CBS) - A new study shows sepsis contributes to about half the deaths in us hospitals every year. Researchers at Kaiser Permanente looked at the hospital records of six and a half million patients and found sepsis was present in only a tenth of patients admitted to the hospital, but it was responsible for at least 52% of hospital deaths. Sepsis occurs when the body over reacts to a serious infection. Intensive care patients are at high risk, so are patients prone to infections after surgery.