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Simon Wain-Hobson Institut Pasteur
Paris
Chair Foundation for Vaccine Research
Washington DC
ABSA Kansas City
One small step for science, a giant risk for mankind
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H1 H2 H3 H4 H5 H6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16
N1 N2 N3 N4 N5 N6 N7 N8 N9
Ducks Shore birds No species
Every influenza virus is in a duck or shore bird
Hemagglutinin Neuraminidase
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PAN
PAN
PAN
H1 H2 H3 H4 H5 H6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16
N1 N2 N3 N4 N5 N6 N7 N8 N9
Pandemic influenza virus are but three
Pandemic Human Viruses
PAN
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PAN
PAN
PAN
H1 H2 H3 H4 H5 H6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16
N1 N2 N3 N4 N5 N6 N7 N8 N9
Sporadic influenza virus are few but…
Pandemic Human Viruses
PAN
Sporadic Human Viruses
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PAN
PAN
PAN
H1 H2 H3 H4 H5 H6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16
N1 N2 N3 N4 N5 N6 N7 N8 N9
… most go nowhere - dead end infections Pre-2009 serology
Southern China
19% 58% 47%
8% 3% 7%
15% 4% 4% 9%
12% 3% 2% nd nd nd
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Dead end infections are all around us
Rabies Nipah and Hendraviruses MERS coronavirus LCMV Pulmonary hantaviruses Simian retroviruses (Foamy, STLV, SIV)
55 000 deaths per year
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SIVhoest
SIVcpz
SIVcpz
HIV-1 M
HIV-1 O
SIVsyk SIVsm SIVagm HIV-2
HIV-1 N
SIVcol
SIVgor
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How?
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How?
~15% SIV positive
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How?
~15% SIV positive
Evidence for continuing cross-species transmission of SIVsmm to humans: characterization of a new HIV-2 lineage in rural Côte d’Ivoire Ahidjo et al., AIDS 27, 2488 (2013)
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We mustn’t confuse reality & novelty
Dead end Next to no transmission. infections Can be highly pathogenic Rabies 55K (case fatality rate CFR>95%) H5N1 < 700 cases in 16 years MERS coronavirus HIV-1 N, P Outbreaks Transmissible yet limited chains SARS coronaviruses Some HIVs, Ebola (CFR~70%) coxsackie-poliovirus recombinants HIV-1 O, HIV-2 Epidemics Common cold viruses, enteroviruses Pandemics Very rare Flu, HIV-1 M
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Gain-of-function (GOF) research means deliberately transforming avian influenza viruses that are not transmissible between mammals into viruses that are capable of efficient transmission
What is influenza virus gain-of-function research?
air flow infected donor ferret receiver ferret
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The pro-GOF group says that it will help prepare for a pandemic while the risks can be mitigated and contained Useful for: • Vaccine development • Drug design • Pandemic preparedness • Interpreting naturally arising mutations in the field
The controversy – summer 2011 to present
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The anti-GOF group says there is nothing in the research to help a Health Minister make robust decisions • A selection screen will come up with what you select for
The controversy – summer 2011 to present
air flow infected donor ferret receiver ferret
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Selective screens - you get what you select for
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Less than 50 years was enough
Dmitri Belyaev selected Siberian silver foxes for reduced fear of humans Lower adrenaline in serum
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The anti-GOF group says there is nothing in the research to help a Health Minister make robust decisions • Vaccines No way! Adel Mahmoud former President of Merck Vaccines This week’s issue of Science Presently many clades of H5N1 circulating Which will make it big time? H5N1 GOF viruses of Asian origin are “old” Chen 2001, Fouchier 2005, Kawaoka 2004
The controversy – summer 2011 to present
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Don’t know which antigenicaly different strain will jump
A/Duck/Chinese/2001 (Chen)
A/Human/Indonesia/2005 (Fouchier)
A/Human/Vietnam/2004 (Kawaoka)
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The anti-GOF group says there is nothing in the research to help a Health Minister make robust decisions • Drug design Can only hope that the next pandemic virus is drug sensitive • Pandemic prediction and preparedness We missed H1N1 from Central America H7N9 came out of the blue, as did the SARS and MERS coronaviruses Stockpiling of drugs - obvious Stockpiling of vaccines – less obvious
The controversy – summer 2011 to present
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The anti-GOF group says there is nothing in the research to help a Health Minister make robust decisions • Interpreting mutations in the field The data can be obtained by testing individual mutations in a gene or reference virus but not in transmission studies Saturation mutagenesis of the receptor pocket in the HA gene Exhaustive analysis of rare human to human transmission cases which do exist Fouchier or Kawaoka mutations in Asian strains do NOT confer growth on human cells for 2009 Egyptian H5N1 strains
The controversy – summer 2011 to present
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The controversy – summer 2011 to present
A/Duck/Chinese/2001 (Chen)
A/Human/Indonesia/2005 (Fouchier)
A/Human/Vietnam/2004 (Kawaoka)
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The controversy – summer 2011 to present
A/Duck/Chinese/2001 (Chen)
A/Human/Indonesia/2005 (Fouchier)
A/Human/Vietnam/2004 (Kawaoka)
A/Duck/Egyptian/2010 A/Human/Egyptian/2009
A/Chicken/Vietnam/2008
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The controversy – summer 2011 to present
Duck/Chinese/2001 (Chen)
Human/Indonesia/2005 (Fouchier)
Human/Vietnam/2004 (Kawaoka)
1 mutation away 3 mutations away
4 mutations away
Tharakaraman et al., Cell 153, 1475 (2013)
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Tharakaraman et al., Cell 153, 1486 (2013)
H7 with avian receptor H7 with human receptor H7 G228S with human receptor
H7N9 – just one mutation away
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• H7 G228S mutant binds apical surface of trachea, submucosal gland and goblet cells • Just like other human adapted influenza A viruses Tharakaraman et al., Cell 153, 1486
H7N9 – just one mutation away
goblet cells
trachea
submucosal gland
trachea
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• Many virologists feel that in nature pathogenesis (case fatality rate, CFR) would be “traded in” for increased transmission • •
Influenza GOF research
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• Many virologists feel that in nature pathogenesis (case fatality rate, CFR) would be “traded in” for increased transmission • However, morbidity, mortality and economic impact is greater for a highly transmissible flu virus with a lower CFR (Verikos et al., 2011) • H5N1 CFR ~60% Spanish flu CFR ~2% <700 cases Most of the world infected
BUT
Influenza GOF research
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• If you select for a HIGHLY pathogenic GOF virus that is highly transmissible among ferrets then you WILL succeed • • •
Influenza GOF research
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• If you select for a HIGHLY pathogenic GOF virus that is highly transmissible among ferrets then you WILL succeed • Smallpox 300-500 M deaths in 20th century • Variola virus didn’t infect most of the world • Virologists are playing with a biological bomb on a very short fuse
Influenza GOF research
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• The potential of these avian influenza GOF viruses can never be assessed because the crucial experiment – infecting humans – is unethical • How do you design a pandemic experiment? • The pro-GOF group can never prove their case they can infer, surmise, project • There is nothing robust for a Health Minister • Meanwhile avian influenza GOF work is proceeding
Poor science
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• Can mitigate the risks but no system is perfect • Some risk factors Mechanical failure Human error Earthquake Overconfidence Hurricane Disgruntled scientist Tornado Weak oversight • One slip, but of gigantic ramifications - a man made flu pandemic • No risk analysis has been published! • Meanwhile avian influenza GOF work is proceeding
GOF risk – unusually high stakes
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My own opinion – Nature March 2013
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I think such [avian influenza GOF] experiments should never be repeated. Existing samples should be destroyed Zeng Guang, Chief epidemiologist Chinese Centre for Disease Control Handelsblatt August 8, 2013
We have no plans to pursue such H7N9 GOF studies Chen Hualan, Director of China's National Avian Influenza Reference Laboratory in Harbin Science August 8, 2013
Other recent opinions worthy of note
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• There is no consensus as to the merits of the science • Hence the benefits are not presently quantifiable • There is tremendous tension among virologists • There has NOT been adequate discussion and debate between stakeholders • Learned societies, regulators and governments have FAILED to show leadership • Meanwhile avian influenza GOF work is proceeding
No consensus as to the benefits
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• FREEZE • Need an international conference with all the stakeholders Virologists, infectious disease clinicians, epidemiologists, biosafety and biosecurity experts, lawyers, ethicists, government officials, university presidents, insurers, military, intelligence services, diplomats, press • Need a risk & liability analysis • Need a considered moral opinion • Need leadership
Pragmatic suggestions
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One open meeting on GOF research
http://royalsociety.org/events/2012/viruses/
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• Mainly closed or limited meetings in the US • Biological Weapons Convention Geneva August 2013 • Dutch National Academy of Science Report pending • German National Ethics Committee Spring 2014 • ASBA October 2013
Leadership has been in short supply
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• This is the Asilomar moment. We are there • It’s about doing robust science • It’s about responsibility in science • It’s about trust in biomedicine
Biggest issue since the Manhatten project
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• This is the Asilomar moment. We are there • It’s about doing robust science • It’s about responsibility in science • It’s about trust in biomedicine • It is NOT about freedom of scientific enquiry • Meanwhile avian influenza GOF work is proceeding
Biggest issue since the Manhatten project
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Our tool box is so powerful that biologists
should have an obligation to do no harm
We have come this far…
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Our tool box is so powerful that biologists
should have an obligation to do no harm
InterAcademy Panel statement on biosecurity
• Scientists have an obligation to do no harm
We have come this far…
68 Academies
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ASBA, we have a problem
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ASBA, we have a problem
• Meanwhile avian influenza GOF work is proceeding
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Selective screens - you get what you select for
Would nature have come up with any of these?
Q
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• Functional sequence space is so huge that there are many ways to be a successful virus • Unlikely that these studies will come up with a single solution if performed 10 times • Fouchier or Kawaoka mutations in 2009 Egyptian H5N1 strains don’t confer growth on human cells • Chen virus dates from 2001, Fouchier virus 2004, Kawaoka virus 2005
H5N1 & H7N9 GOF research
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• Major theme of early NSABB discussions involved Nature and Science • Papers were already in the cloud thanks to email and uploading to Nature and Science web sites! • Discussion was unbelievably cloud naïve • BP Hanley Security in a goldfish bowl: the NSABB’s exacerbation of the bioterrorism threat J Bioterr Biodef 2013 S3
Publish it, publish it not
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Although we live in a dangerous world
• There are more viruses than cells on the planet • All species are under threat from tens of viruses • RNA viruses mutate rapidly (influenza > HIV) can recombine (HIV) or reassort (influenza) massively
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Although we live in a dangerous world
• There are more viruses than cells on the planet • All species are under threat from tens of viruses • RNA viruses mutate rapidly (influenza > HIV) can recombine (HIV) or reassort (influenza) massively • The presence of so many species means that in the predator-prey game we do rather well
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• RNA viruses are mutation machines • A virus stock contains every single point mutation • The mutant is at a frequency of ~10-4
We are there, and naturally!
goblet cells
trachea
submucosal gland
trachea