Skip to Content
Skip to Navigation

Immunization

What causes rubella?

Rubella is caused by a virus.

How does rubella spread?

Rubella spreads from person to person through the air. Rubella is contagious but less so than measles and chickenpox.

How long does it take to show signs of rubella after being exposed?

The incubation period varies from 12 to 23 days (average, 14 days). Symptoms are often mild and may be inapparent up to half of the time.


What causes rotavirus disease?

Rotavirus disease is caused by a virus, the rotavirus. The name rotavirus is derived from the Latin rota, meaning "wheel," because the rotavirus has a wheel-like appearance when viewed by an electron microscope.


What causes polio?

Polio is caused by a virus.

How does polio spread?

Polio is usually spread via the fecal-oral route (i.e., the virus is transmitted from the stool of an infected person to the mouth of another person from contaminated hands or such objects as eating utensils). Some cases may be spread directly via an oral to oral route.

How long does it take to show signs of polio after being exposed?

The incubation period of polio is commonly 6-20 days, with a range of 3-35 days.


What causes pneumococcal disease?

Pneumococcal disease is caused by Streptococcus pneumoniae, a bacterium. There are more than 90 subtypes. Most subtypes can cause disease, but only a few produce the majority of invasive pneumococcal infections. The 10 most common subtypes cause 62% of invasive disease worldwide.


What causes pertussis?

Pertussis is caused by a bacterium, Bordetella pertussis.

How does pertussis spread?

Pertussis is spread through the air by infectious droplets and is highly contagious.

How long does it take to show signs of pertussis after being exposed?

The incubation period of pertussis is commonly seven to 10 days, with a range of 5-21 days.

What are the symptoms of pertussis?

Pertussis disease can be divided into three stages:


What causes meningococcal disease?

Meningococcal disease is caused by the bacterium Neisseria meningitidis. This bacterium has at least 13 different subtypes. Five of these subtypes, A, B, C, Y, and W-135, cause almost all invasive disease. The relative importance of these five subgroups depends on geographic location and other factors.


What causes measles?

Measles is caused by a virus.

How does measles spread?

Measles is spread through the air by infectious droplets and is highly contagious.

How long does it take to show signs of measles after being exposed?

It takes an average of 10-12 days from exposure to the first symptom, which is usually fever. The measles rash doesn't usually appear until approximately 14 days after exposure, 2-3 days after the fever begins.


What causes diphtheria?

Diphtheria is caused by a bacterium, Corynebacterium diphtheriae. The actual disease is caused when the bacteria release a toxin, or poison, into the person's body.

How does diphtheria spread?

Diphtheria bacteria live in the mouth, throat, and nose of an infected person and can be passed to others by coughing or sneezing. Occasionally, transmission occurs from skin sores or through articles soiled with discharge from sores of infected persons.


What causes chickenpox?

Chickenpox is caused by a virus, the varicella-zoster virus.

How does chickenpox spread?

Chickenpox spreads from person to person by direct contact or through the air by coughing or sneezing. It is highly contagious. It can also be spread through direct contact with the fluid from a blister of a person infected with chickenpox, or from direct contact with a sore from a person with shingles.


What causes mumps?

Mumps is caused by a virus.

How does mumps spread?

Mumps spreads from person to person through the air. It is less contagious than measles or chickenpox.

How long does it take to show signs of mumps after being exposed?

The incubation period of mumps is 14-18 days, but can range from 14-25 days.

What are the symptoms of mumps?

Individuals with mumps usually first feel sick with such nonspecific symptoms as headache, loss of appetite, and low-grade fever.


Syndicate content