Wars and epidemics can, or have been "given credit for", change. The Covid-19 pandemic is, of course, tragic for many families, but what effect will it have on the nation and the world?
Liquidity:
Will people still live on credit - or keep more in reserve?
Epidemiology:
Will the "science" of epidemiology gain traction - or just be a "bad joke"?
Ventilation:
Will hotels, apartments and cruise ships be built with ventilation that will stop the spread of airborne particles?
Genetic Modification:
Many think that the Covid-19 virus was GMed as a biological weapon... but could they GM viruses to create a "harmless" virus that could give immunity to serious pathogens? (Cowpox was used to give immunity to smallpox).
Internet:
I think that the internet has had a major boost as a result of Covid-19... but will it mean that teleconferencing will reduce business air travel?
Gross National Product
Wars tend to "affect" the working population, infrastructure, etc., and have a lasting effect on GNP, but, if most businesses can survive, most of the tax-payers survive, and most of us still have roofs over our heads, how soon can the economy bounce back?