Vaccine Approval Usually Takes Two Years

Those Tested Only Followed For Two Months

Prof. Yossi Karko, director of the clinical research unit at Hadassah-University Medical Center, has warned that the data published by Moderna and Pfizer about their coronavirus vaccine candidates is limited.

Karko noted that the safety data is “very short” – only spanning the period of about two months from inoculation.

“The FDA has a mechanism of approving drugs and vaccines for emergency cases. What this means, is that the FDA has initial safety data. But if this was a usual situation, the researchers would have followed the volunteers for at least two years before the vaccine was approved,” he said.

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