Sample size of 8 is not really a huge issue for this kind of analysis. The hypothesis is that the Moderna vaccine produces antibodies against the new variant.

Sample size of 8 is not really a huge issue for this kind of analysis. The hypothesis is that the Moderna vaccine produces antibodies against the new variant. 8/8 people sampled produced antibodies. Can we confidently say that 100% of people will produce antibodies? No, not with a sample size of 8. Can we say confidently that 50% of people will produce antibodies? That the vaccine gives you a coin toss's odds? If it's just a coin toss, this result would be the same probability as 8 "heads" in a row, or 1 in 256. So, the result is hardly FUD or meaningless. They've also submitted to journals for the world to inspect the results.