Why do you suddenly wake up at 3 am? Here's the scientific reason The problem of waking up at 3 am is linked to the natural fluctuations of the cortisol hormone , and stress increases it. Many people have trouble waking up suddenly at exactly 3 am or between 3 and 4 am. Some consider it a ghost or an ominous sign, but according to science, it is an important signal related to the body's internal clock and hormones. If you also frequently wake up at 3 am, you should not take it lightly. This may indicate that your sleep cycle is disrupted and stress has increased in the body. The main reason for sleep disturbance at this time of night is the natural fluctuations of the cortisol hormone. Circadian rhythm : Relationship with the body's internal clock There is an automatic 24-hour clock running inside our body, which is called the circadian rhythm, or biological clock. This clock controls when we sleep, when we wake up, when we eat, and when we are energetic. This clock is ...
Can measles be prevented by vaccination? Measles has existed in society for hundreds of years. The physician Abu Walker wrote about this disease for the first time in the tenth century. But the virus that causes this disease originated in the world 2600 years ago. Centuries ago, even doctors had trouble telling the difference between measles and smallpox. It was only in the seventeenth century that the British government listed these two diseases separately. Measles is a highly contagious disease. One infected person can infect up to 18 people. Before the introduction of the measles vaccine, the disease was widespread around the world, and countless children died because of it. It is estimated that more than 2 million people worldwide died from measles before measles vaccines were available. If a person who has not been vaccinated against measles gets infected with measles, 10 to 30 percent of those infected may die due to complications. In 1874, a third of the infected died in a ...