Why would a pneumonia vaccination cause arm edema and fever?

Hello Anon

Thank you for writing.

Cellulitis refers to an infection of the skin. It may spread to tissue just beneath the skin's surface. The infection may occur anywhere on the body. It is most common on the face or lower legs.

Cellulitis is often caused by a bacterial infection. It may come from bacteria that normally lives on the skin or bacteria from other sources. The bacterial infection may be caused by:

A minor injury to the skin, such as a cut, scratch, blister, puncture, or bite, that becomes infected and spreads into the surrounding skin
Chickenpox blisters that open up and become infected with bacteria
Injuries that occur in natural bodies of water that become infected with germs found in the water
A cut or abrasion that becomes infected by food bacteria while handling fish, poultry, eggs, or meat
Bacteria that enter the body through surgical wounds or a catheter in a vein
Infection in a person with diabetes or a weakened immune system
Bacteria spreading from an upper respiratory or ear infection
Impaired circulation (tends to cause recurrence of cellulitis)
MRSA infection —drug resistant infection that can be spread through shared towel or sport equipment

Factors that increase your risk for cellulitis include:

Insect, animal, or human bites
Diabetes
Weakened immune system, such as AIDS or being on chemotherapy
Alcoholism
Chronic use of steroids
Kidney and liver failure
Surgical procedures
Poor circulation or peripheral vascular disease
Swelling or fluid retention
Intravenous drug abuse
Burns
Exposure to raw fish, meat, hides, shellfish, poultry, or eggs
Symptoms
Symptoms may begin within hours or days and can include:

Skin inflammation that begins in a small area and spreads with:
Redness
Pain or tenderness
Swelling
Warmth
A red streak (possibly)
Swollen lymph nodes
Fever or chills
Fatigue
Headache
Cellulitis near the eyes may cause pain with eye movements and should be treated urgently.

There is a study on this kind of reaction to the pneumonia shot, it's a little wordy but understandable- read this here (cut and paste): https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5396240/

Stay in contact with your doctor and you can report this reaction to the government VAERS program here (cut and paste) - https://vaers.hhs.gov/
I hope this clears up for you soon-
Susan