má sāi fēng
measles, mumps and rubella (MMR) (abbr. for 麻疹[ma2 zhen3] + 流行性腮腺炎[liu2 xing2 xing4 sai1 xian4 yan2] + 風疹|风疹[feng1 zhen3])
麻
má
generic name for hemp, flax etc
腮
sāi
variant of 腮[sai1]
风
fēng
wind