诺罗病毒

• 罒(net; mesh (variant form))RADICAL
• 夕(evening; dusk)PHONETIC

Spreading a net at dusk to catch birds is the original meaning of the character.

• 疒(illness; patient in bed)RADICAL
• 丙(third heavenly stem)PHONETIC

A person lying on a sickbed crying out in pain everywhere sounds like "bing."

• 母(mother; origin)RADICAL
• 龶(toxic grass; harmful plant)ASSOCIATIVE

A toxic plant grows from the earth like a mother nurturing life, but carries deadly poison.