@Mr._Clark and
@TLS Guy, as well as all others who follow this.
Apparently there are more wide spread doubts about the recent press releases from Moderna or The Jenner Institute about the progress of their vaccines.
I read this op-ed column in today's Washington Post. For those who want to read the whole article, I attached a full copy of it below. I added yellow highlighting for several paragraphs that I wanted to focus on.
The author, William Haseltine, a scientist with great experience in cancer and HIV/AIDS research, doesn't pull any punches. He questions the Moderna press release featuring partial results of 8 vaccine recipients among a total of 45. Why was there only partial info from 8 recipients, and why was it only about neutralizing antibodies and not other immune responses, such as T cell based immunity?
Going on, he questioned last month's press release from the NIH about partial clinical results with remdesivir. No primary or supporting data was shown. 20 days after the press release, there is still no further data of any kind. Haseltine mentioned another paper, published the same day as the NIH press release, that showed remdesivir had no measurable effect on patient survival or the amount of virus detectable in nasopharynx and lung secretions. "Without the data, no doctor treating a patient can be sure they are doing the right thing."
Finally, Haseltine focused on a press release by the Jenner Institute at Oxford University, concerning favorable results from a pre-clinical study in monkeys. Data, released as a pre-publication, appeared 2 weeks after the press release. It didn't live up to the earlier claim.
"All of the vaccinated monkeys became infected when introduced to the virus. Though there was some reduction in the amount of viral RNA detected in the lungs, there was no reduction in the nasal secretions in the vaccinated monkeys. So the positive result reported by the Oxford group turned out not to be protection from infection at all, something most would agree is what a successful vaccine would do. Instead, it lowered only the amount of virus recoverable from the vaccinated monkey’s lung."
So, we must excercise extreme caution when it comes to press releases announced as developments in Covid-19 vaccines or medications. Partial results cannot be evaluated unless full data is shown. And, it looks like there is still quite a lot of work to be done before a successful SARS-CoV-2 vaccine can be announced.