Table 1 Proportions of DIPs in the three commercially sourced monovalent LAIV prototypes and H3N2 LAIV preparations with varying proportions of DIPs

From: Live attenuated influenza vaccine with low proportions of defective interfering particles elicits robust immunogenicity and cross-protection

Strain designation

STV (EID50/mL)

HA (HAU/100 µL)

Total particles /mLa

Proportion of STV (%)a

Proportion of DIPs (%)a

Ratio of STV to HAb

Commercially sourced LAIV prototypes

A/17/Hong Kong/2014/8296 (H3N2)

5.0 × 1010

219

1.0 × 1013

0.5

99.5

9536.7

A/New York/61/2015-CDC-LV16A (H1N1)pmd09

1.9 × 1011

217

2.6 × 1012

7.3

92.7

144,958.5

B/56/Brisbane/60/08 (Victoria lineage)

6.7 × 109

214

3.3 × 1011

2.0

98.0

40,893.6

H3N2 LAIV preparations (A/17/Hong Kong/2014/8296) with varying proportions of DIPs

Low DIPs LAIV

3.6 × 109

29

1.0 × 1010

36.0

64.0

703,125.0

Middle DIPs LAIV

1.7 × 1010

213

1.6 × 1011

10.6

89.4

207,519.5

High DIPs LAIV

1.3 × 1010

217

2.6 × 1012

0.5

99.5

9918.2

  1. aMethods developed by Reichl and colleagues11.
  2. bMethods developed by López and colleagues12.