Fig 1. Overview of the process flows, starting with inoculation of 25.000 eggs and resulting in 6 vaccine products.
In the boxes the unit operations are presented. Fraction identification number is written below the unit operation box. Fraction 1.2 (clarified allantoic fluid) was equally divided over the six process streams. The processes from left to right, with the end product, given in the bottom boxes below the unit operation ‘Sterile Filtration’: 5.1FE standard Cantacuzino Institute process for H3N2 strain, 5.1F Whole Inactivated Virus (WIV) inactivated by formaldehyde, 5.1FT formaldehyde inactivated, Triton split virus product, 5.1BE beta-propiolactone (BPL) inactivated, ether split virus product, 5.1B WIV inactivated by BPL, 5.1BT standard Intravacc process.