In an X post that went viral Sunday, Elon Musk said he "felt like I was dying" and almost went to the hospital after taking his second COVID-19 vaccine.

Musk was responding to an X post about how Dr. Helmut Sterz, Pfizer's former chief toxicologist, admitted last month during a German COVID-19 Inquiry that an estimated 60,000 people have died in Germany from Pfizer's mRNA COVID-19 vaccine, Comirnaty.

According to Sterz, the Paul Ehrlich Institute, Germany's regulatory and research institute for vaccines and biomedicines, has received 2,133 reports of death following Pfizer's COVID-19 vaccine.

He said, "These spontaneous reports likely have a high number of unreported cases due to underreporting. The true number is therefore much higher."

"In the U.S., it is assumed that there is an underreporting factor of 30 by which the registered cases would have to be multiplied. For Germany, this would correspond to 60,000 deaths from the vaccination," Sterz said.

Sterz told the German commissioners that Pfizer's post-marketing report mentioned 1,200 suspected deaths within just two months of the shot's approval.

"At that point, Comirnaty should have been withdrawn from the market," Sterz said.

Pfizer skipped key safety studies due to 'time constraints'

Sterz also testified that "due to time constraints," Pfizer didn't conduct vital safety checks on its COVID-19 vaccine before rolling it out to the public. For instance, the vaccine maker skipped carcinogenicity studies that would have examined whether the shots had cancer-causing properties.

Pfizer also failed to study the vaccine's impact on pregnancy.

Sterz called for a new and independent scientific review of the COVID-19 vaccines' long-term effects. "We need proper independent safety studies to understand what really happened. Without full transparency, people will not trust the conclusions," he said, according to GB News.

He said the high number of negative side effects associated with the vaccines warrants pausing them, and other vaccines that use similar technology, until independent studies show they are safe.