It has recently come to light that the countries with the highest Covid-19 death rates also have the highest rates of influenza vaccine uptake among the elderly. ( http://www.bmj.com/content/369/bmj.m1932/rr-15)
For 20 European countries there was a strong geographic correlation: r=0.730, P<<0.001.

I recently updated this and the correlation persists: r=0.744, P<<0.001.
( http://www.worldometers.info/coronavirus , 6/6/20)
“Correlations can be treacherous.” So said The Lancet more than 40 years ago. (Editorial, “The Anomaly That Wouldn’t Go Away” November 4, 1978, page 978)

Would Dr. Bloom consider the foregoing correlation to be treacherous? Would he say it is “harmful misinformation”?
This correlation is consistent with case-control studies and one randomized trial associating flu shots with non-influenza virus infections, including coronaviruses.

(Cowling et al, Clin Infect Dis 2012;54:1778. Kelly et al, Pediatr Inf Dis J 2011;30:107. Wolff, Vaccine 2020;38:350) There are plausible immune mechanisms, including virus interference, indicating that this could be a causal association. https://www.bmj.com/content/369/bmj.m2184/rr-4?fbclid=IwAR3UZr7vFdWt3DndBwibuhoJTJHA_St2N-ddatEcPMhCxjHqgEt4O7uZLio