Is influenza C bad?
Influenza C virus infections generally cause mild illness and are not thought to cause human epidemics.
What does C mean on influenza test?
Negative: Only a reddish purple Control line (C position), with no Test line at the A or B position, indicates that Influenza A or B antigen has not been detected. A negative result does not exclude influenza viral infection.
How common is influenza C?
Influenza C virus (ICV) is a common yet under-recognized cause of acute respiratory illness. ICV seropositivity has been found to be as high as 90% by 7–10 years of age, suggesting that most people are exposed to ICV at least once during childhood.
Is influenza C contagious?
The flu is contagious from the day before symptoms start to five to seven days after becoming sick. The incubation period of the flu, or how long it can take to develop symptoms after exposure and infection, is about one to four days.
Where does influenza C come from?
INTRODUCTION. Influenza C viruses have been isolated worldwide from humans with mild upper respiratory tract disease. Only recently, additional isolates from pigs were reported from China (1).
How long is influenza C contagious?
Adults are most contagious with the flu from 24 hours before symptoms start to three to five days afterward. Children can spread the virus for longer—up to 10 days, and sometimes even beyond that. People who have serious immune system problems can spread influenza for weeks, or even months, after they get it.
How do you get influenza C?
Influenza C virus currently has 6 lineages, which were estimated to have emerged around 1896 AD. This virus may be spread from person to person through respiratory droplets or by fomites (non-living material) due to its ability to survive on surfaces for short durations.
Where did influenza C come from?
Influenza B virus appears to naturally infect only humans, but influenza C virus has been isolated mainly from humans and also from swine in China. 2. The HA and NA of influenza A viruses exhibit much greater amino-acid-sequence variability than their counterparts in the influenza B viruses.
How long does influenza C last?
According to the Centers for Disease Control and Prevention (CDC) , an uncomplicated influenza infection will last from three to seven days in most people, including children. However, a cough and feelings of weakness or fatigue can last for two weeks or longer.
Is influenza AB or C worse?
There are three types of flu viruses: A, B, and C. Type A and B cause the annual influenza epidemics that have up to 20% of the population sniffling, aching, coughing, and running high fevers. Type C also causes flu; however, type C flu symptoms are much less severe.
Is there a vaccine for influenza C?
There is no vaccine against influenza C virus.