Fever with rash – based on day of appearance of rash

Menmonic – Very Sick People Must Take Double Tablets

This is decoded as follows:

Fever with rash appearing on (approximately)

Day 1 – Varicella
Day 2 – Scarlet Fever
Day 3 – Small Pox
Day 4 – Measles
Day 5 – Typhus
Day 6 – Dengue
Day 7 – Typhoid