General side effects: tiredness, headache, muscle pain, chills, joint pain, fever, nausea, feeling unwell, swollen lymph ...

The third scenario, in which the booster dose was with the Pfizer vaccine, showed the highest percentages of effectiveness: 56.8% against symptomatic infections and 85.5% against severe cases.

Pfizer and BioNTech have formally asked for FDA approval of a third dose of their COVID-19 vaccine BNT162b2 in people aged over 16, as the US prepares to get its booster campaign underway.

you’re eligible to get a Pfizer booster shot, the CDC says. Right now, the Pfizer vaccine is the only one available to people below the age of 18, so adolescents don’t need to worry about the ...