The virus will be a prevalent there as here, if not worse I would think, because Lima is more densely populated than CABA.
Your decision, in my view, boils down to options you will have should you get sick. If you can afford to go to a private clinic in Lima (they abound, but are particularly concentrated in the vicinity of Avenida Guardia Civil) and pay whatever they will charge you in the absence of Peruvian health insurance, you will be very well looked after and even overserviced, at least until the first wave of serious infections start to overwhelm both the private and public systems.
I have no experience of the private clinics here, but judging by what I am seeing on the other thread about the attention in private clinics here, in a private clinic, even with insurance, you may not be as well attended, even before the wave hits. But I don't know that, it is just the impression the other thread is giving.
If, on the other hand, you cannot afford a private clinic in Lima, get sick, and have to fall back on the public hospital system, you will be in serious trouble, even now, before the wave hits.
I tend to agree with Perry, based on seven years living in Lima (where I have close friends in the private health sector, including Kuczyinski's cardiologist, and others who work in the public system) and two years living here: with all its faults and dangers, Peru is a vastly more serious and industrious country than Argentina (Argentines can't believe that, or don't want to believe that, but they tend not to get out much, unfortunately).
If I had the choice of going back there to see through this Coronavirus through, I would be inclined towards doing so.