World animal health body warns of swine fever vaccine risks as Vietnam
readies exports
Send a link to a friend
[December 05, 2023]
By Francesco Guarascio, Khanh Vu and Mikhail Flores
HANOI/MANILA (Reuters) - The World Organisation for Animal Health (WOAH)
is warning that more testing of African swine fever vaccines is needed,
triggered by Vietnam's plans to export doses in coming months to fight a
disease that regularly ravages pig farms worldwide.
WOAH says AVAC Vietnam JSC, the producer of one of the two vaccines, has
not shared sufficient data with international researchers and bodies.
Gregorio Torres, head of the science department at WOAH, urged countries
interested in using AVAC's vaccines to conduct their own trials before
approving it.
In a world first, Vietnam authorised in July two attenuated live-virus
vaccines against the disease, which is not deadly to humans but is
extremely infectious among pigs and has caused repeated disruptions to
the global pork market, which data provider Research and Markets said
was worth about $250 billion in 2022.
In October, as AVAC was about to announce deals with importers of its
vaccine in the Philippines, Indonesia, Malaysia, India and Myanmar, WOAH
warned of risks "from use of sub-standard vaccines".
![](http://archives.lincolndailynews.com/2023/Dec/05/images/ads/current/siu_sda_120123.png)
Torres said that Vietnam's announcements led to the warning, but that it
was not linked to concerns about specific vaccines.
AVAC says that its vaccine is not dangerous and that widespread use will
demonstrate it.
"We have proven our product is safe and effective and we need some time
to prove that to all, including those showing concern," Nguyen Van Diep,
AVAC's chief operating officer, told Reuters.
He did not respond to questions about whether the company was sharing
data with international researchers.
Diep said that the vaccine had been safely used in farms in 17 provinces
in Vietnam since its approval and that sales were increasing.
Scientists at the U.S. Department of Agriculture (USDA) discovered the
AVAC vaccine, which was then developed in Vietnam because the virus is
not present in the United States. The agency did not have access to
Vietnam's trials data, a USDA spokesperson told Reuters.
"If somebody puts in the market a vaccine which is suboptimal, it will
impact everybody," Torres said, noting that it is harder to assess
vaccines in countries with ongoing epidemics, such as Vietnam, because
pigs could be infected by the attenuated virus in the vaccine alongside
the wild virus.
Countries are eager for vaccines against African swine fever (ASF),
which is incurable and has a high fatality rate, resulting in heavy
losses for farms that become infected.
[to top of second column]
|
![](../images/120523PIX/health26.jpg)
Pigs are seen at a farm outside Hanoi, Vietnam September 20, 2019.
REUTERS/Kham/File photo
![](http://archives.lincolndailynews.com/2015/May/02/images/ads/current/guzzardo_lda022609.png) China has also developed several
vaccines but none has gotten commercial approval.
AVAC is producing between 2.5 and 5 million doses a month and was
planning to export 5 million, pending approval from the countries
where the company signed commercial deals, Diep said, noting that a
green light from the Philippines might come early next year.
TRADE SANCTIONS?
Torres said the agency was discussing a new global standard for
evaluating ASF vaccines, with possible approval coming in May at the
WOAH general assembly. The intergovernmental organisation, based in
Paris, has 183 member states.
The standard would not be compulsory, as national regulators decide
on approvals, but it could lead to trade restrictions against
pork-exporting countries that vaccinate pigs with sub-standard
shots.
The AVAC vaccine was trialled in the Philippines with 300,000 doses.
The Food and Drug Administration of the Philippines, which is in
charge of the vaccine approval, did not reply to requests for
comment.
Philippines Agriculture Undersecretary Deogracias Victor Savellano
told Reuters his country had not approved or purchased the vaccine
yet, noting the regulator's authorisation was critical to food
security, as the country faces a national emergency caused by the
spread of ASF.
Regulators from India, Indonesia, Myanmar and Malaysia did not
respond to requests for comment.
The second approved ASF vaccine, produced by Vietnam's Navetco
Central Veterinary Medicine from a USDA platform, had shared
positive trial data and is being tested in the Dominican Republic,
the USDA said.
Navetco did not reply to a request for comment.
(Reporting by Francesco Guarascio @fraguarascio and Khanh Vu;
additional reporting by Mai Nguyen in Hanoi, Mikhail Flores and
Karen Lema in Manila, Rishika Sadam in Hyderabad, Dewi Kurniawati in
Jakarta, Thu Thu Aung, and Rozanna Latiff in Kuala Lumpur; editing
by)
[© 2023 Thomson Reuters. All rights
reserved.]This material may not be published,
broadcast, rewritten or redistributed.
Thompson Reuters is solely responsible for this content.
![](http://archives.lincolndailynews.com/2023/Dec/05/images/ads/current/graue_sda_042021.png) |