Guys do not pounce on the writer, journalist most of the times have little knowledge on all matters, they hardly have depth (cant generalize though) ... The best thing is more information has come out from the reactions ..Taking Cloroquin Phosphate relieves joint pain..well yes its also prescribed for arthritis. Zinc and Vitamin C are immune boosters so they are tonics not treatment I guess.
But my suggestion is learn as much as you can also can take Vitamin C tabs or Zinc caps.(Becozinc in India is a good combination) .. this is precaution..
If there is any symptom keep the knowledge aside and go to a good General Practitioner or Physician they will know the best.