Viral hepatitis – one of the common infectious diseases in human beings – is a serious threat to human health. When it comes to hepatitis, people often only know that it is caused by hepatitis A virus or hepatitis B virus, but in fact, in the family of hepatitis viruses known to humans, in addition to hepatitis A virus and hepatitis B virus, there are also hepatitis C, D and E viruses. We call them the five brothers of hepatitis viruses. Let’s ask each of them to introduce themselves! Hello everyone! I am the hepatitis A virus, the oldest of the hepatitis viruses. My body is spherical, only 27nm-32nm in diameter, and I am an RNA virus. People can’t see me, only under the electron microscope can we see my real face. My resistance is strong, acid and alkali resistant, surviving 1 week at room temperature, 30 days at 25°C in dry feces, and months if in shellfish, sewage, fresh water, seawater, and mud. Everyone who eats food containing me, haha! You are at risk of having hepatitis A. It is better to ask your human friends to be hygienic in their diet! I am the hepatitis B virus, the second oldest of the hepatitis viruses. Although I am the second, but my reputation in our five brothers is the loudest, no modesty to say that the reputation of the outside, you can say that human beings are talking about “hepatitis B” fear, people who are infected with me may suffer from hepatitis, some can develop into serious liver, cirrhosis, and even change into liver cancer, so humans hate me to the bone. Here is a glimpse of my face! Under the electron microscope, I have three forms of particles, namely large spherical particles, small spherical particles and tubular particles, of which large spherical particles are my complete form with a diameter of 42 nm. I am more survivable than the oldest, and can tolerate heat, low temperature, drying, ultraviolet light and general concentration of disinfectants. However, my transmission route is different from the oldest , mainly blood body fluid and mother-to-child transmission. I am hepatitis C virus, my reputation is not as loud as the two older brothers, I am also spherical particles, 30 ~ 60nm in diameter, resistance is much worse than the second brother, the mode of transmission is similar to the second brother, but I can also be sexually transmitted! Humans infected with me mainly manifested as chronic hepatitis. I am hepatitis D virus, I am dependent on Ergo and must rely on Ergo to replicate, I am also spherical, with a diameter of 35~37nm . I am the hepatitis E virus, the fifth in line, also spherical, 27-34 nm in diameter, relatively small, my transmission route is similar to that of the older brother, but the human infection with me is much heavier than the infection with the older brother, especially pregnant women and the elderly should pay more attention to it, for you, sometimes it can be fatal.