MSD’s SEQUIVITY IAV-S NA PCV3, a custom prescription vaccine, is the first commercial vaccine to use only the influenza neuraminidase (NA) surface antigen to vaccinate pigs against influenza strains H1N1, H1N2 and H3N2.

ADMINISTRATION

• Intramuscular (IM) Injection:
  • Where: Neck muscle, behind the ear.
  • Needle: Varies by pig size (e.g., 1/2-inch for young pigs, 1.5-inch for sows).
  • Dose: Often 2 mL, with a booster 3-4 weeks later.
  • Process: Use sterile equipment, restrain pigs well to prevent broken needles, and ensure the full dose is delivered.
• Oral/Feed (Gel):
  • How: Applied to mats in farrowing crates for pigs to consume.
  • Use: Good for large groups, delivering a precise dose in a non-invasive way.
• Intranasal (Nose):
  • How: Dripped or sprayed into the nose (often used for modified-live vaccines).
  • Benefit: Can induce immunity in the respiratory tract, but may require individual animal handling or specialized sprayers.
• In Water:
  • How: Added to drinking water (less common for swine flu but used for other swine vaccines).