Vaccine fluid

The answer

SERUM

5 letters. See every clue for this answer on the SERUM answer page.

Used 9 times across 6 distinct years; most recently in 2025; first recorded in 2011. It appears in 2 publications in the xd corpus. Frequency and last-seen figures come from the xd crossword corpus only.

Other clues for SERUM

Every other clue in this collection answered by SERUM, most used first.

• Antitoxin - used 36 times, most recently in 2025
• Blood component - used 36 times, most recently in 2025
• Truth ___ - used 31 times, most recently in 2024
• Blood fluid - used 23 times, most recently in 2026
• Whey of milk. - used 14 times, most recently in 1983
• Blood bank fluid - used 13 times, most recently in 2020
• Word with truth or blood - used 12 times, most recently in 2015
• Blood part - used 10 times, most recently in 2026
• Skin care product - used 10 times, most recently in 2026
• __ cholesterol - used 9 times, most recently in 2021
• Immunization fluid - used 9 times, most recently in 2026
• Flu fighter - used 8 times, most recently in 2022
• Red Cross supply - used 8 times, most recently in 2021
• Hospital supply - used 7 times, most recently in 2025
• Vaccine - used 7 times, most recently in 2002
• Whey - used 7 times, most recently in 2005
• Blood bank supply - used 6 times, most recently in 2021
• It's in your blood - used 6 times, most recently in 2022

Related clues

Clues in this collection of the same answer length that share a word with this clue, or match its answer pattern when no word is shared. Most used first.

• Polio vaccine developer - SABIN, used 32 times
• Salk vaccine target - POLIO, used 29 times
• Antiknock fluid - ETHYL, used 20 times
• Vaccine pioneer - SABIN, used 10 times
• Vital fluid - BLOOD, used 8 times
• Oral vaccine developer - SABIN, used 7 times

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