Haven't seen a lot of hard data on how smoking affects COVID-19 prognosis. I saw one article that said one study showed it significantly increased the risk of complications and death, but two other studies showed no correlation. Simple logic would suggest that it increases risk since your lungs aren't as healthy as they otherwise would be when the infection starts doing its thing.
Still, even though data still suggests that given adequate medical care the confirmed-case fatality rate is around 2% (still several orders of magnitude higher than the flu) with the vast majority of those being over 50 and the majority of those being over 70; I'm still hearing enough stories of people in their early 40s or 30s getting fatal or near fatal cases to make me nervous despite my relatively low risk demographics (I'm 34, nonsmoker, 5'11"/188, haven't even had a cold or flu that I remember since November 2016). I'm also concerned for my fiancée (also 34, but has several health conditions) and my parents (my dad just turned 71, my mom will turn 69 next month; so any snark about 'all the olds dying' or COVID-19 being a 'boomer remover' doesn't sit well with me).
Also, I bolded "adequate" above because that's the scenario if the hospital isn't overwhelmed and you can get on a ventilator if you need to. AKA not what happened in Italy and, it's becoming apparent, New York.
So, all in all, I am social-distancing the **** out of this and encouraging everyone I can to do so as well. I should add that my fiancée and I are quite fortunate that we both work in fields that are considered "essential" to continue to operate during this quasi-lockdown, so our income has so far been unaffected; yet both our employers are taking major steps to reduce the risk to their employees (she has worked from home every day this week except today, my job description requires me to be physically present but we are practicing 6' social distancing and using an obscene amount of hand sanitizer and disinfecting wipes/spray several times per shift, and those members of staff who CAN work from home are).