Deadlest virus

A vaccine for Dengue was approved in by the U. Food and Drug Administration for use in children years old living in areas where dengue is common and with a confirmed history of virus infection, according to the CDC. In some countries, an approved vaccine is available for those years old, but again, recipients must have contracted a confirmed case of dengue in the past.

Those who have not caught the virus before could be put at risk of developing severe dengue if given the vaccine. Two vaccines are now available to protect children from rotavirus, the leading cause of severe diarrheal illness among babies and young children. The virus can spread rapidly, through what researchers call the fecal-oral route meaning that small particles of feces end up being consumed. Although children in the developed world rarely die from rotavirus infection , the disease is a killer in the developing world, where rehydration treatments are not widely available.

The WHO estimates that worldwide, there are more than 25 million outpatient visits and two million hospitalizations each year due to rotavirus infections.

Countries that have introduced the vaccine have reported sharp declines in rotavirus hospitalizations and deaths. The virus likely emerged in bats initially, then hopped into nocturnal mammals called civets before finally infecting humans, according to the Journal of Virology. After triggering an outbreak in China, SARS spread to 26 countries around the world, infecting more than people and killing more than over the course of several months, according to History.

The disease causes fever, chills and body aches, and often progresses to pneumonia, a severe condition in which the lungs become inflamed and fill with pus. SARS has an estimated mortality rate of 9. The virus may have originated in bats and passed through an intermediate animal before infecting people, according to Nature.

The initial outbreak prompted an extensive quarantine of Wuhan and nearby cities, restrictions on travel to and from affected countries and a worldwide effort to develop diagnostics, treatments and vaccines. Since its appearance, the virus has caused over five million deaths worldwide, according to Reuters. Common symptoms include fever, cough, loss of taste or smell and shortness of breath and more serious symptoms include breathing difficulties, chest pain and loss of mobility.

On Aug. In December , this vaccine became the first to be approved after a large clinical trial, according to Nature. According to WHO , the disease infected camels before passing into humans and can trigger a fever, coughing and shortness of breath in infected people.

There is no vaccine available to prevent this disease, according to the NHS. The best way to reduce the chances of infection is to wash hands regularly, avoid contact with camels and not consume products containing raw animal milk. Live Science. See all comments Don't said:. Meh said:. Comment on rabies fatality rate. Although all warm-blooded animals are thought to be susceptible to rabies, there are strains of the rabies virus multiple bat stains strains are maintained in particular reservoir host s , with some cross over especially in the US between raccoons and skunks.

Although a strain can cause rabies in other species, the virus usually dies out during serial passage in species to which it is not adapted, and non-carnivores cows, horses, deer, groundhogs, beavers AND CATS, like small rodents, are dead-end hosts. Most viruses do cause disease, with many of them specific to the cells they attack.

One of the biggest differences between the two is that bacteria can be treated with antibiotics, while viruses cannot due to their small size and the fact that they reproduce inside of the cell.

Viruses can be managed with medicines, but there is no cure for them, although viruses can be prevented with vaccines. Once symptoms of rabies start to appear, it is too late and the disease will be fatal.

The virus causes approximately 55, deaths worldwide each year. While it was eradicated in , the smallpox virus is one of the most deadly viruses in history. It has been around for more than 3, years and killed million people in the 20th century alone. It is the only human disease to have been completely eradicated to date. The coronavirus, which has been named SARS-CoV2, is part of a family of viral infections that afflict people around the world and were first identified in the s.

Seven different types of coronavirus have been identified, four of which are fairly common. The other three evolved from infected animals to created deadly coronaviruses, all of which are illustrated on this chart. View All Notifications. Your diet should be healthy and colorful: Oranges, red peppers, green leafy vegetables and red cabbage provide a potpourri of vitamins, and are especially rich in natural vitamin C.

In order to ensure your immune system is top-top, make sure you have all the necessary immunizations. Adults often forget to refresh vaccinations they had when they were young. Check if you need booster shots for tetanus, diphtheria, whooping cough, polio, hepatitis, pneumococcus, meningitis, measles, mumps, rubella, the flu and others.

Be sure to talk to your doctor! Scientific studies suggest that regular muscle training jogging, nordic or pole walking, taking a stroll , three times a week for 20 minutes can boost your defenses.

But be careful: overdoing it can also drain your immune system. Sufficient sleep doesn't just allow your body to recuperate. During the slow-wave sleep phase, neurotransmitters are released and the immune system springs into action. Studies show that good spirits and a zest for life promote a strong immune system.

Laughing and playing don't just provide for a better quality of life, they also boost the body's defenses. Negative stress activates the release of adrenalin and cortisol. These hormones can paralyze the immune system. Sensible stress and time management allows the body to rest and replenish new energy. Selective relaxation exercises like meditation, autogenic training and yoga can significantly boost the immune system.

Taking walks in the fresh air gives you a change of temperature and exercise - both stimulate the body's defense systems. Mucous membranes also benefit from improved circulation and the increased humidity makes it easier to fight off attacks. Studies have shown that burning up short chain sugars like fructose and glucose uses up many vitamins that are no longer available to the body.

Alternating hot and cold showers help regulate body heat and improve blood flow. An invigorating massage with a massage sponge or brush stimulates the immune system even more.

Malaria, dengue fever, zika — mosquitoes aren't just annoying when they buzz around your ear at night, they can also infect us with countless illnesses. On World Mosquito Day, here are some of the most dangerous ones. Aeroplanes allow us to travel all over the world. We can cover vast distances in a short space of time. But often when we fly, there are thousands of potentially harmful viruses tagging along for the journey.

Amid the ongoing spread of Dengue fever within and even outside the tropics, another mosquito-borne illness has disease specialists alarmed. DW takes a look at the basic facts surrounding the Zika virus. Visit the new DW website Take a look at the beta version of dw. Go to the new dw. More info OK. Wrong language? Change it here DW. COM has chosen English as your language setting. COM in 30 languages. Deutsche Welle. Audiotrainer Deutschtrainer Die Bienenretter.

Science Top 10 most dangerous viruses in the world Bird flu, Ebola and Zika - there seems to be news on a new dangerous virus almost every day. Read more: Spy assassinations: The top five deadly poisons Just how dangerous is mercury, anyway? How to prevent cancer 4. The Marburg virus under a microscope. The most dangerous mosquito-borne diseases Malaria, dengue fever, zika — mosquitoes aren't just annoying when they buzz around your ear at night, they can also infect us with countless illnesses.

Germs at the airport: A hotbed for viruses Aeroplanes allow us to travel all over the world. What you should know about Zika virus Amid the ongoing spread of Dengue fever within and even outside the tropics, another mosquito-borne illness has disease specialists alarmed.