You can block it. The unit won't heat or cool that room anymore though. The return air does effect supply air temp. And heat pump efficiency. With a 60 degree return air temp, the heat pump is more efficient then with a 70 degree return air temp.
We are simply getting contaminated causing otherwise healthy folks to lose the function of their kidneys and for a senior citizen who is already suffering sarcopenia this can be a death sentence because of the complexities associated with Renal Failure.
Watch Judge Rosemarie Aquilinia hand down her 175-year sentence to Larry Nassar. SI.com 4 days ago - Sports: Judge to Larry Nassar: 'I just signed your death warrant' Judge Rosemarie Aquilina sentenced Larry Nassar to 40 to 175 years in prison after pleading guilty to 10 charges of sexual assault.