I would say it is never too late. Obesity is a well-known co-morbidity for flu (https:/www.ncbi.nlm.nih.gov/labs/pmc/articles/PMC7130453) and it was mentioned by Campbell among others in relation to coronaviruses and their lethality as early as Spring 2020.

Interesting comments here
https://www.zerohedge.com/covid-19/new-hampshire-pharmacies-could-soon-begin-dispensing-ivermectin-w ithout-doctors