84. There are three main types of virus that cause flu, which are called type A, B and C. type A is the most powerful of the three, and undergoes minor changes in its genetic material every few years. The new form of the virus is called a strain. The new strain is not affected ...
After 10 years of evolution that produced annual epidemics, the 1957 flu disappeared in 1968, only to be replaced by a new influenza A subtype, H3N2. This virus is still in circulation. The flu outbreak of 1968 was the third influenza pandemic of the 20th century and resulted in an ...
Seasonal flu follows a pattern, starting in the fall and ending in the spring. The first sign is often a sudden rise in the number of school-age kids getting sick. This is usually followed soon after by illness in other groups, such as parents and caregivers. The CDC advises getting a ...
mass vaccination programs carried out against diphtheria, polio, and measles have almost eradicated these diseases from the population. The graphs indicate the years the vaccines were introduced. Data source: U.S. Bureau of the Census,Historical Statistics of the United States: Colonial Times to 197...
You can treat herpes, but once you get it, you’ll always have it. When symptoms show up, it’s called having an outbreak. The first is usually the worst. Most people have them on and off for several years, but they get milder and happen less often over time. ...
Adults older than 50 years Adults or children who are in close contact with people who have medical conditions that put them at higher risk for severe complications from influenza.For maximum effectiveness, doctors advise getting vaccinated at the start of flu season. This generally means October ...
It is estimated that 25%-40% of infected people with COVID-19 do not have symptoms and may be more likely to spread it compared to flu. This may be a factor in the higher transmission rate of COVID-19 compared to flu. Symptoms for both viruses may be very difficult to distinguish, ...
STDs have become more common in recent years, partly because people are becoming sexually active at a younger age, are having multiple partners, and do not use preventive methods to lessen their chance of acquiring an STD. Seniors show a marked increase in STDs in the last few years as many...
The flu may also be harmful for a developing baby, as having a fever while you’re pregnant can be associated with neural tube defects and other serious complications, per March of Dimes. This is why it’s especially important to get your flu shot if you’re pregnant, as it will also ...
the use of sexual "toys," such as vibrators. STDs probably have been around for thousands of years, but the most dangerous of these conditions, theacquired immunodeficiency syndrome(AIDSorHIVdisease), has only been recognized since 1984.