### condition | illness | disease:

Flu
* Most flu has serious symptoms.
* affects people who are at high risk more severely.
* also causes muscle aches and tiredness
  - tends to come in waves, while colds are fairly constant
* always mutates at least slightly each year.
* can affect people of any age.
* can be devastating, even for people who are healthy
  - especially dangerous to the elderly
* can cause fever, and fever is dehydrating
  - vomiting, as well as food poisoning
* can lead to other complications
  - pneumonia and death
  - sweep through a barn, leaving horses with runny noses, wheezing and coughing
* causes fever, chills, cough, and muscle aches
  - most people to be ill for only a few days
* comes on quickly and attacks the upper respiratory system.
* common contagious respiratory infection caused by a virus.
* family of viral infections.
* folk illness.
* frequently causes chills, headaches and muscle pains.
* highly contagious disease caused by one or more strains of influenza virus.
* includes coughs.
* infects millions of people every year, and it can cause death
  - up to one hundred million people in the Northern Hemisphere every year
* is actually short for influenza and is caused by a virus that infects the respiratory tract
  - also responsible for millions of lost workdays, the scientists say
* is an acute and contagious infection of the respiratory tract
  - infectious disease caused by a virus found in birds and mammals
  - viruses that infect the respiratory tract
  - contagion
  - fairly common, often dangerous in kids
  - influenza, an illness caused by a virus
  - often worse in children with chronic lung or heart diseases
  - one of the leading causes of death in elderly people during the winter months
* is short for influenza, a highly contagious virus that infects the respiratory system
* is spread from person to person through droplets that are coughed or sneezed into the air
  - through sneezing, coughing or direct contact with the infected individual
  - treated by providing children with plenty of fluids and rest
* is treated with rest and fluids
  - rest, fluids and paracetamol
  - very infectious and can be passed easily from person to person
* lower-respiratory viral infection and is highly contagious.
* occurs most often in the winter.
* potentially serious disease which can be life threatening to the chronically ill and aged.
* respiratory illness.
* spreads through the air from sneezing and coughing or through close physical contact.
* strikes people with weak immune systems the hardest
  - within one to three days after exposure to the virus
* usually brings on aches and pains
  - mild disease in healthy children, young adults, and middle-aged people
* viral disease.
* virus and thus antibiotics are useless against it.
* winter-time respiratory disease caused by influenza virus, and it can be fatal.

### condition | illness | disease | flu:

Flu vaccination
* are still the best available means for preventing influenza
  - very safe
* protect against flu.

Swine flu
* is caused by sub-microscopic organisms called viruses
  - common in pigs
+ Swine influenza: Diseases caused by viruses
  * Swine flu is common in pigs. Normally, it only infects people who have been in close contact with pigs. However, the disease has also spread from one person to another. Sometimes this ends in death.

Focal disease
* causes focal deficits.
* has a better visual prognosis than more diffuse disease.

Foliar disease
* affecting large areas of fields can significantly reduce yields.
* are also much easier to control where suckers are pruned
  - favored by extended periods of leaf wetness
* can be a problem in plant beds.
* tend to be worse in thick growth.

Gallbladder disease
* can occur with or without gallstones.
* common type of illness involving the biliary tree.
* fairly common condition.
* is another
  - more likely in an older population and among women