Related Clues:

• Red Cross supply
• Substance on a slide
• Lab supply
• Two capsules, say
• Hospital lab supply
• It's in your blood
• Blood part
• 'Que' follower, in song
• 'Will be,' to Doris Day
• Red Cross supplies
• Teaspoon or tablet, say
• Part of Doris Day's theme song
• Blood fluids
• Two tablets, say
• Immunologists' samples