How Chickenpox Spreads
Chickenpox spreads easily from person to person through respiratory droplets released when an infected individual coughs or sneezes. It may also be transmitted through direct contact with the fluid from chickenpox blisters.
The infection is highly contagious, particularly before the rash appears and during the blister stage. Individuals without prior immunity are at higher risk of contracting the infection after exposure.
Common Symptoms
Symptoms typically appear 10 to 21 days after exposure and may include:
- Fever
- Tiredness or fatigue
- Headache
- Loss of appetite
- Itchy rash that progresses from red spots to blisters
- Scabs forming as the rash heals
The rash usually begins on the face or trunk before spreading to other parts of the body.
Possible Complications
Although many cases resolve without long-term effects, complications may occur, particularly in adults, pregnant individuals, or those with weakened immune systems.
Possible complications include:
- Skin infections from scratching blisters
- Pneumonia
- Inflammation of the brain (encephalitis)
- Bloodstream infections
- Increased severity in adulthood
The virus can also remain inactive in the body after recovery and may reactivate later as shingles.
Who Should Consider Chickenpox Vaccination
Vaccination may be recommended for individuals who:
- Have not previously had chickenpox
- Have not received vaccination in childhood
- Work in healthcare, childcare, or education settings
- Live with individuals who may be medically vulnerable
- Are planning pregnancy and lack immunity
- Are frequently exposed to group environments
Vaccination may also be considered for individuals who wish to reduce the risk of future shingles infection.