Circumvent PCV-M G2Circumvent PCV M G2 100 mL or 500 mL (50 dose or 250 dose) Merck's next generation circo virus 2 and Mycoplasma hypopneumoniae vaccine features a flexible dosing option that allows you to innoculate pigs as early as three days of age. One Dose Option: One 2 mL dose can be given to pigs 3 weeks of age or older Two Dose Option: The initial 1 mL dose can be given to pigs as early as 3 days of age with the second 1 mL dose following 3 weeks later. Use: