In an excerpt from a Bhagavad-gita class given by Srila A.C Bhaktivedanta Swami Prabhupada, Srila Prabhupada explains that no-amount of counteraction can save us from danger if it is our destiny. This is especially applicable now when so many trillions of peoples hard earned money is going into vaccine production and the like.
The medicine... A person is suffering from some disease, some fatal disease. If you think, "I shall engage first-class physician and I shall supply first-class medicine," if you think, "then the patient will be saved," no, that is not possible. That is not possible. We have got many experiences like that. Then no rich man would have died. Because he has got money, he can employ first-class physician, first-class medicine, and simply by engaging such things, counteracting, pratikaram, he cannot be saved. There are many examples like that. So the conclusion is, tavad vibho tanu-bhrtam tvad-upeksitanam [SB 7.9.19]: "If You neglect, if You have decided that this person, this child cannot be saved, then any amount of pratikaram will not help. Will not help."
Therefore real pratikaram is Krsna. Real pratikaram is Krsna, counteractive. So better we take shelter of Krsna as Krsna says, sarva-dharman parityajya mam ekam saranam vraja [Bg 18.66].
- Srila Prabhupada, Bhagavad-gita class, August 1st 1973, London.