I indeed see nearly ideal CVs in many literature articles (CVs which are rather rectangular with rounded corners). In other figures, though, I see relative deviation from "rectangles with rounded corners," in that I see abrupt peaks, spikes, or valleys.
The New York Times: C.D.C. Uncertainty Upends Covid Vaccine Access at CVS and Walgreens
State laws and regulatory chaos are driving the country’s largest pharmacy chains to require prescriptions or hold back altogether unless a C.D.C. panel acts. By Maggie Astor and Dani Blum CVS and ...