There are only a few people in America who don’t have the flu, the Zika virus or other symptoms associated with the illness, and they all get it in their late teens or early 20s.
The virus, which has been circulating in the U.S. since March, has also struck women who have had unprotected sex, leaving them at greater risk of transmitting the disease to their unborn children.
This is because of a key part of the virus that many people have yet to understand.
“It’s called a latent period,” said Dr. Daniel Ritter, a professor of pediatrics and immunology at the University of Pittsburgh Medical Center.
“The virus can’t infect cells that haven’t been exposed to virus, and the cells don’t develop immunity.
In other words, there’s no immune response until you have a latent infection.
And this means the virus can remain dormant for months, or even years, before it can be detectable by the body’s own immune system.
But if you have an infected person who has never been exposed, or a virus-free person who hasn’t had a virus in the past, the virus is still circulating.
It can remain in a latent state for up to two months, which is why so many people don’t know if they’re infected or not, Ritter said.
That means a latent case of Zika can linger in the body for years, which could potentially be life-threatening.
Scientists aren’t sure exactly what causes this condition, but the virus’ ability to persist in the blood and organs for decades has been identified as a key reason for why some people have trouble developing symptoms.
What are the symptoms?
Symptoms of Zika include:A rash usually lasts for a few days and can range from mild to severe, and can be seen most commonly on the arms, legs and hands.
A runny nose and a cough are common, but it can also be severe and may involve difficulty breathing.
Most people have no symptoms of Zika infection, but some will develop fever and rash, joint pain or muscle aches.
Rabies can also cause severe brain inflammation, which can lead to paralysis.
People with weakened immune systems may also develop mild or moderate symptoms, including:Dizziness and headacheCommon among some people with Zika-related symptoms is fever, muscle ache and joint pain, but they’re usually mild.
Zika also can cause severe joint pain and numbness in one or both legs.
Anemia and kidney failureThe condition of low red blood cell counts can also occur in some people who have never been infected with Zika.
If you have low red cell counts, you may also experience kidney or liver failure, which may be life threatening.
Symptoms may also vary among people who’ve never been bitten by the virus.
How is it transmitted?
If someone is bitten by a mosquito and has symptoms of infection, they can pass the virus on to another person.
According to the CDC, the average number of mosquitoes carrying the virus in a single person is between 15,000 and 80,000.
These mosquitoes can carry the virus for up at least one week after the bite, depending on the mosquito.
Even if they don’t bite, a person who is bitten could still transmit the virus by breathing the virus-infected air.
Although it is very rare for people to become infected, if a mosquito bites you, you could be infected with the virus and spread it to others.
Who’s at risk?
People who have sex with other people or who have unprotected sex with a partner who has recently been infected could become infected with this virus.
The CDC says this risk increases for those who have already been infected and those who are in close contact with a person infected with that virus.
Symptoms include:Hearing problems that cause difficulty speaking or understanding spoken words, difficulty seeing, confusion or difficulty following instructions and inability to concentrate.
Mild or moderate headaches that often feel like they are in your ear.
A fever that ranges from 103 to 107.
Fever that may become severe.
Severe or rapid loss of appetite.
Weakness in the muscles in your arms, feet and legs.
Symptom can last for days, weeks or months.
What are symptoms of Guillain-Barré syndrome?
Symptomatic Guillan-Béra syndrome (GBS) is the name given to a constellation of symptoms, all of which can include the following:Cough that appears suddenly and can last from a few hours to several days.
Headaches that are severe and are not relieved with time.
A mild or intermittent fever that is not accompanied by any other symptoms.
Rash or fever that usually lasts only a day or two, with no sign of worsening.
Seemingly constant headaches, including fatigue and weakness.
Hearing loss that is painful or may be unbearable.
A sudden loss