Those readers wishing to obtain these ‘Covid’ cures and preventatives should first seek medical advice: (a waste of time in Australia)
Vitamin D from a US dietician who

 recommends 50,000 IU vitamin D at the first sign of illness for at least 3 days,  then taper down once symptoms begin to improve.

Also, here is a resource for obtaining Ivermectin or HCQ worldwide:

And in the U.S.