According to Flu, a U.S. Department of Health and Human Services website, influenza A's symptoms are similar to other strains of flu, consisting of fever, chills, coughing, sore throat, runny or congested nose, headaches and fatigue. Vomiting and diarrhea occurs primarily in children and occasionally in adults.Continue Reading
Influenza A can infect animals, though WebMD says this is less common. It is typically transmitted through wild birds or other people. Of the three types of flu, only types A and B can affect humans with any severity.
The influenza A virus and its variants change constantly, which is why medical professionals emphasize the need to receive the flu vaccine yearly. As an example, in 2009 when the so-called "swine flu" began to spread, the virus strain differed significantly from typical flu and caused the first flu pandemic in 45 years. While there is no vaccine for avian or swine flu, the yearly vaccine recommended by the CDC contains protections against H1N1 and H3N2 viruses.
The World Health Organization warns that Type A flu has a higher incidence of viral pneumonia and higher fatality results among healthy young adults. It occurs more frequently in the winter season. As with any type of influenza, Type A flu is transmitted through any surface that an infected person has touched.Learn more about Conditions & Diseases
The first sign of an HIV infection is often a flu-like illness that produces symptoms such as muscle aches, fever, diarrhea, headaches, sore throat and chills, explains Mayo Clinic. As the infection progresses to AIDS, symptoms such as shaking chills, night sweats, chronic fever and a cough may occur.Full Answer >
Some of the earliest signs of the flu include the sudden onset of excessive fatigue, aches and chills, coughing and chest tightness, soreness in the throat, fever and gastrointestinal problems, such as nausea, stomach pain, vomiting and diarrhea. Some early symptoms require emergency medical attention, according to Healthline. These include chest pain, difficulties breathing, a bluish color on the skin and lips, severe dehydration, dizziness, confusion and a recurring fever.Full Answer >
Common flu symptoms include a fever that is over 100 degrees Fahrenheit, chills and headaches, a dry cough and nasal congestion, according to Mayo Clinic. Many people also experience fatigue, weakness and muscle aches, especially in the arms, legs and back.Full Answer >
Symptoms of the flu include a fever of 100 degrees Fahrenheit or greater, sore throat, cough, runny or stuffy nose, chills, headache, body ache, fatigue, vomiting, nausea and diarrhea, according to Flu.gov. Not all people with the flu will experience all symptoms.Full Answer >