EACH year, millions of people suffer from seasonal influenza, which is often called the flu. Flu is a respiratory illness caused by viruses that infect the nose, throat, and sometimes the lungs.

Flu is a mild illness for some people. But for others, including older adults and those with chronic (long-lasting) health conditions, the flu can be very serious and even life-threatening. Getting a flu vaccine every year can help prevent the flu. The vaccine is safe, effective, and available for little to no cost to you.

Most people who get the flu feel better after a few days to two weeks. However, the flu can make you seriously ill. Some people develop other health issues, called complications, because of the flu. Complications can be mild, such as a sinus or ear infection, or more serious, like pneumonia.

Anyone can get sick from the flu, but some people are more likely to have complications. You are more at risk for flu and its complications if you:

1) are age 65 or older.

2) have certain medical conditions such as asthma, diabetes, or chronic kidney disease.

3) have heart disease or have had a stroke

4) live in a nursing home or other long-term care facility

Flu vaccination is especially important for people in these higher-risk groups.

The flu is more dangerous for older adults for a few reasons. One reason is that the immune system — which helps your body fight infections — weakens as you age. For example, because your body is busy fighting off the flu, you might pick up a secondary infection such as pneumonia. A second reason is that older adults are also more likely to have other health conditions, like diabetes, that increase their risk for complications from the flu.

The good news is the flu vaccine reduces your risk of getting the flu and of getting seriously ill if you do get sick with the flu. Flu vaccination is especially helpful for people with chronic health conditions. For example, it has been linked to lower rates of heart problems (cardiac events) among people with heart disease and fewer hospitalisations among people who have chronic lung disease or diabetes.

Source: US National Institute for Aging