Pfizer's vaccine does not contain any parasites. Vaccines do not contain any living organisms that cause HIV or other deadly diseases.
The U.S. FDA's fact sheet and the CDC document do not list HIV as one of the vaccine ingredients. The vaccine has undergone rigorous clinical trials before approval. It is safe and efficacious in preventing COVID-19 though many have reported side effects like fever, nausea, etc., following vaccination. Moreover, Samaniego has made several dubious claims in the past, denounced by health experts.
The COVID-19 pandemic has given rise to a lot of potentially dangerous misinformation. For reliable advice on COVID-19, including symptoms, prevention, and available treatment, please refer to the World Health Organization or your national healthcare authority.