Case study: Nubia s mother Experimental drugs and pregnancy in the Ebola epidemic West-Africa

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Transcription:

Case study: Nubia s mother Experimental drugs and pregnancy in the 2014-2016 Ebola epidemic West-Africa 3-4 nov 2016 Buenos Aires Argentina Séverine Caluwaerts, OBGYN, MPH 1

The setting : 2014-2016 Ebola epidemic Guinea West-Africa Oct 2015 2

Mortality? 3

Clinical trials in Ebola: Ethical considerations for use of unregistered interventions for Ebola viral disease. WHO 11 August 2014 In the particular context of the current Ebola outbreak in West Africa, it is ethically acceptable to offer unproven interventions that have shown promising results in the laboratory and in animal models but have not yet been evaluated for safety and efficacy in humans as potential treatment or prevention.

MSF and Clinical Ebola trials? Favipiravir Brincidofovir Convalescent plasma VsV vaccination trial 5

Drug Choice? MSF and partners selected 3 therapeutic interventions (Favipiravir/Brincidofovir/convalescent plasma) based on: Efficacy and safety data Antiviral preferred over host support Availability and post trial access possibilities Way of administration Option not to randomise (comparison with historical controls) Pregnant women? Favipiravir: no insurance in trial,monitored Emergency use allowed Brincidofovir: never allowed (refusal by manufacturer) Convalescent plasma: no problem 6

Vsv Vaccine trial (March-June 2015) (WHO promotor) Not allowed in pregnant women /children under 6 (vaccine given to family members/contacts of confirmed Ebola positive patients and to health care workers) Bút: no pregnancy testing before administration => +/- 20 women were vaccinated while pregnant! http://www.who.int/mediacentre/news/releases/2015/effective-ebola-vaccine/en/ 7

Lancet, August 2016 8

Nubia s mother Forécariah, Guinea, oct 2015 25 yr old, third trimester pregnancy Cared for woman in same household who died of Ebola Everyone in the household vaccinated except for her and a 3-month old baby Developed fever and tested Ebola postive after a few days => referred to MSF 9

Nubia s mother Patient was in poor clinical condition and had very high viral load Baby apparently alive (mother reported fetal movements) MSF wanted Zmapp for her (Zmapp trial ongoing in centre near by, promotor NIH) => refusal Zmapp outside clinical trial => Pt could enter clinical trial but 50% chance of receiving placebo negotiations ongoing 10

Nubia s mother Favipiravir administered Mother went into labour and delivered baby 4 days after admission, Nubia, 3 kg and alive and well Mother died 7 hours after birth of haemorrhage and diffuse intravascular coagulation (complication Ebola) Nubia received without delay first Zmapp within 24 hours after birth, after some days GS5734 and buffy coat survivor, she survived 11

Issues for discussion (1) 1. Availability experimental drugs for pregnant women was complicated in Ebola (Brincidofovir: impossible Favipiravir: lengthy process) => Potentially pregnancy could be a negative prognostic factor, no access to experimental drugs 12

Issues for discussion(2) 2. Zmapp once the baby was born was obtained immediately, for the mother the centre where the trial was managed insisted on randomisation => The baby seems to have been «privileged» compared to her mother 3. Ebola vaccination access for pregnant women: => Ebola is a condition with > 50% mortality, Nubia s mother was at high risk to contract the disease but she was not eligible for vaccination 13

Issues for discussion (3) 4. Nubia s mother herself was never involved in the discussion process All pictures MSF, 2015 14

15

Acknowledgements to Frontline workers and communities THANK YOU WALL OF SURVIVORS