Immune against Covid 19

adipocytes are very ACE2 expression laden
for fat people they also cause constant unspecific immune system response in form of inflammation
which is largely useless against viral infections because they're not alive, while the enhanced cell destruction for sure is helping to some extent, the fever is not because RNA and DNA are relatively temperature stable (a lot more stable than the capsids at least, RNA is 70 degrees and life is of extremophile RNA origin, which is just the same kind of RNA just older)
so they benefit from the same efficiency increase from the host cells inner working from temperature
while the body extends a lot of energy
but overall, being anorexic is very bad for your immune system because fat is a crucial part of the immune system response (modulation and a good buffer) as well as an important hormone modulator for many hormones, but especially sexual hormones (see research on anorexia and sexual hormone expression, delayed, stopped vs adipose children with precocious and how much of the youngest teen moms are fat black girls)

If your parents are bother O+, so should you

thank god
155lbs master race here

well im not for real im +A and both my parents +O and im not adopted

pasta la vista

That's likely because of the rarity, no reason to assume they are immune. It is true that weak people were said to be spared by the spanish flu as well, though.

it's fucking not. i used to be under 18.5 for years.

Having muscle is useless for 95% of people. Get a gun or even just a can of pepper spray and find a useful hobby. Being 70kg is a good weight when you're 180cm tall, do some cardio and some light weight training and you'll be fine.

ah yes 1% of the population constitutes 1% of the infected
must be because they're immune

Not really. Just skinny.