WINNIPEG/TORONTO Aug 14 An experimental Ebola
vaccine that is offering some hope for West Africa was invented
in a small Canadian Prairie city and had its roots in the Cold
War, the German town of Marburg and a disease scare that
panicked Toronto in the 1970s.
The Canadian government said this week that the Ebola
vaccine, developed at its National Microbiology Laboratory in
Winnipeg, Manitoba, though untested on humans, would be offered
to the World Health Organization for use in Africa.
The WHO ruled on Tuesday that it would be ethical, given the
extraordinary circumstances of the Ebola outbreak, to give
untested treatments to infected patients. Canada is one of only
two countries in the world, along with the United States, to
have developed an Ebola vaccine.
The Winnipeg lab where the vaccine, called VSV-EBOV, was
developed also produced some of the components of the ZMapp
treatment given to two American aid workers who were stricken
"Research into Ebola is not something that we've done well
on globally. If it was going to be done, it wouldn't be done in
the countries most affected by it because they don't have the
research infrastructure," said Allison McGeer, director of
infection control at Toronto's Mount Sinai hospital.
"Canada has a history in these things. Don't forget
Connaught Laboratories," she said, referring to a Toronto lab
whose scientists discovered insulin and later contributed to the
development of a polio vaccine.
The development of the VSV-EBOV Ebola vaccine was fueled by
a fortuitous collection of infectious disease experts who worked
at the Winnipeg lab in the early 2000s, and by their decision to
take up the ambitious challenge of trying to tame Ebola.
The facility in the Prairie city is one of only a handful of
North American labs capable of handling level four, or BSL-4,
pathogens and the only such lab in Canada.
The scientists decided to tackle Ebola even though it has
historically killed fewer people than other diseases. The latest
outbreak, the world's deadliest, has so far taken 1,069 lives
mostly in Guinea, Liberia and Sierra Leone.
"Ebola is so infectious and so aggressive that we're using
it also as a disease model, with the rationale that if we can
find a good vaccine against Ebola, if we can find a good
treatment, (they) will likely work for us against other agents,"
Gary Kobinger, chief of special pathogens at the Winnipeg
facility, told Reuters.
"The beginning of the rationale was, 'Let's try to tackle
that one, just because it's the toughest one'."
SHADOW OF MARBURG
The Ebola research was led by Heinz Feldmann who was
recruited to work at the Winnipeg lab when it opened in 1999.
He came from the University of Marburg in Germany. A virus
similar to Ebola caused a 1967 outbreak in the university town,
and was named the Marburg virus. Feldmann's interest in
hemorrhagic fever was a key factor behind the Winnipeg push for
an experimental vaccine.
"We both grew up next door to BSL-4 labs," said Thomas
Geisbert, a former virologist at U.S. Army Medical Research
Institute of Infectious Diseases, who worked on the experimental
vaccine with Feldmann.
"We had this idea, certainly more his idea than mine, (about
how a vaccine could work)."
In 2005, the Winnipeg team announced it had developed an
Ebola vaccine that was highly effective in monkeys. Along with
collaborators in the United States, Germany and France, it
published the results in the journal Nature Medicine.
The lab never tested its vaccine on humans because Ebola had
affected a relatively small number of people globally, Kobinger
said. More lethal viruses and diseases competed for funding.
Feldmann, who left Winnipeg in 2008 to join a U.S. National
Institutes of Health lab in Montana, was en route to Africa and
declined to comment for this story.
Before the Winnipeg lab opened, Canada did not have a single
level four lab. Samples from patients who showed symptoms of
certain rare diseases were sent to the United States for
A suspected Lassa fever case in Toronto in 1976, however,
sparked panic in the city. A hospital was shut down for days and
staff put in isolation until results of tests came back negative
from the United States, where hemorrhagic fever had been studied
for years. By the early 1980s, Canada was planning its own lab.
Geisbert said reports that the Soviet Union had developed
Marburg and Ebola viruses as weapons during the Cold War spurred
the U.S. military's search for a vaccine, and government funding
for Ebola research also jumped after the Sept. 11, 2001 attacks.
"We had great support from governments to do that work, to
develop these products, to show that they work in nonhuman
primates," said Geisbert, now a professor at the University of
Texas in Galveston.
"I can tell you that I think of the four or five vaccines
that work in nonhuman primates, I would take this one, my whole
lab would take this one in a heartbeat."
(Additional reporting by Euan Rocha in Toronto; David Ljunggren
in Ottawa; Editing by Amran Abocar; and Peter Galloway)