No? Nothing? Cath, you disappoint me.
Ok, here we go:
Equally ...Maybe you could comment on the fact that measles is a benign illness in anyone who has adequate levels of vitamin A
No, it isn’t. Pre-existing Vitamin A deficiency is a risk factor for complications, but not the only factor.
Second, there is quite a bit of literature (Caballero and Rice, 1992, Friedan et al 1992, and others) around the primary causative factor - does measles depress serum retinol levels (Perry and Halsey 2004 and others), or does low serum retinol increase the likelihood of complications, or a combination.
It seems established that infection can affect serum retinol levels by a significant level - not just with measles. Basically a number of researchers indicate that acute measles worsens vit a deficiency by depleting the body’s stores and increasing its utilisation.
Either way, the current treatment protocol of Vit A supplementation for measles cases is supported by data reflecting better outcomes.
The broader question related to vaccination is: so what? Are you suggesting a broad-scale vitamin A supplementation programme as an alternative to vaccination? How do you arrive at the correct dose for each adult and child? Have you considered the risks of vitamin a loads that are too high, and of toxicity? What about the child whose vitamin a is abnormally low because they’ve just had an infection and got measles straight afterwards - are they collateral damage? Are communities with poor nutrition also reasonable collateral damage?