Pfizer vaccine is jointly developed by American Pharma giant Pfizer and Germany’s BioNTech and when launched in UK, people have developed allergic reactions from it as per the reports of UK officials.

Normally COVID patients will have hyper allergic reactions because their immune system is compromised due to COVID infection. And when they are given this vaccine due to over reaction and misdirected immune response more allergies were developed which are some times fatal

Dizziness

Difficulty in breathing

Confusion and Anxiety

Fast heartbeat

Sudden moments of unconsciousness

Sweaty skin are some developed reaction when Pfizer was given.

So, UK regulatory has warned people that patients who are infected as well as recovered with  COVID-19 and are having allergies should avoid taking this vaccine.