“Those who cannot remember the past are condemned to repeat it.”
George Santayana
It is difficult to ascertain the effectiveness of the masks used in 1918. Today, we have a growing body of evidence that well-constructed cloth face coverings are an effective tool in slowing the spread of COVID-19. It remains to be seen, however, whether Americans will maintain the widespread use of face masks as our current pandemic continues to unfold. Deeply entrenched ideals of individual freedom, the lack of cohesive messaging and leadership on mask wearing, and pervasive misinformation have proven to be major hindrances thus far, precisely when the crisis demands consensus and widespread compliance. This was certainly the case in many communities during the fall of 1918. That pandemic ultimately killed about 675,000 people in the U.S. Hopefully, history is not in the process of repeating itself today.
Mask resistance during a pandemic isn’t new – in 1918 many Americans were ‘slackers’
lifeunderwriter.net 
We’re not even through the first wave yet. Unfortunately I believe we’re headed toward the 675,000 deaths mark. From what I’ve read COVID-19 is much more infectious than the flu. I fear as winter and cold weather approaches we’re going to have a double whammy with COVID-19 plus the seasonal flu. With many more thousands dying, I’m going to do what I can to prevent my being among those.