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NEW DELHI, Apr 27 2012 (IPS) - Ignoring widespread concern over the safety, efficacy and cost of pentavalent vaccines, India’s central health ministry has, this month, approved inclusion of the prophylactic cocktail in the universal immunisation programme in seven of its provinces.
Pentavalent vaccine doses, a cocktail of five antigens in a single shot, confers immunity against five paediatric diseases – diphtheria, pertussis, tetanus, hepatitis B and haemophilus influenza type b (Hib), with the last one considered particularly problematic by some experts.
Pentavalents, produced by several manufacturers and promoted by the Global Alliance on Vaccines and Immunisation (GAVI), has had a history of causing adverse reactions and deaths in India’s neighbouring countries like Bhutan, Sri Lanka and Pakistan.
In 2010, the National Technical Advisory Group on Immunisation (NTAGI), a body of experts selected by the Indian government, recommended limited introduction of pentavalents in southern Kerala and Tamil Nadu and evaluation of results over a year before extension to other states.
Pentavalents were launched in Kerala and Tamil Nadu in December 2011, but the results were not encouraging. Kerala recorded four infant deaths following vaccination, with symptoms similar to what were seen in other South Asian countries.
Public health activists in Kerala, a state with 100 percent literacy and human development indices similar to those of advanced Western countries, quickly filed a public interest litigation (PIL) in the Kerala High Court asking for intervention in having the programme called off and a return to the existing health plan.
In making the decision, the government overlooked the NTAGI, which has not even been convened since August 2010 when the body suggested limited introduction to Kerala and Tamil Nadu as the two states have good adverse event following immunisation systems.
“Going by what we have seen in the neighbouring countries and now in the state of Kerala, pentavalents can, without warning, cause children (to suffer) hypersensitivity reactions and death,” Jacob Puliyel, an eminent paediatrician at St. Stephen’s hospital in New Delhi and member of the NTAGI, told IPS.
Puliyel likened the situation to penicillin sensitivity and said it bordered on criminality to be administering pentavalents without first testing a child for hypersensitivity. “Every child that is being given a dose of pentavalent vaccine is a potential victim of the adverse reaction,” he said.
Puliyel was among the many eminent physicians and public health activists in India who wrote to World Health Organisation (WHO) director-general Margaret Chan on Apr. 3 asking the health body to “re-evaluate” its recommendation of pentavalent vaccines on the grounds of safety.
Another signatory, Dr Meera Shiva, an expert on pharmaceutical drugs attached to the voluntary Medico Friends Circle, told IPS that WHO had to delist a number of brands of ‘prequalified’ pentavalent vaccine, “but adverse reactions persist and we have surely not heard the last of them.”
The letter to Chan, written under the aegis of the All-India Drug Action Network, an umbrella of public health activist groups, suggested that the cause of the vaccination- related deaths was likely to be “hypersensitivity reaction as described in the post mortem report on one of the children (who died) in Kerala.”
“Unlike conventional drug treatments meant for the management of existing diseases, in prophylaxis with vaccines, safety is of paramount importance. Vaccines that frequently and unpredictably cause the death of healthy children cannot be recommended,” the letter to Chan said.
Policy analysts specialising in vaccines said they were dismayed at the move to approve pentavalents in as many as seven of India’s states, which account for 340 million of India’s 1.2 billion people.
“Pentavalents are a test case for India’s new policy on vaccines that is in keeping with liberalisation and openly favours pharmaceutical majors at the cost of India’s public sector vaccine units,” said Madhavi Yennapu, a scientist who specialises in vaccines at the central government’s National Institute of Science, Technology and Development Studies.
Twenty of India’s 23 public sector vaccination units, once the mainstay of the country’s immunisation programme, have been shut down one after another over the last four years on the grounds that the quality of their products was suspect.
Yennapu pointed to the draft National Vaccination Policy, released last year, for clues on why the government has not made any serious attempt to revive the vaccine- manufacturing units by enforcing quality standards, for instance.
The new policy demands that the “risk of manufacturing vaccines by private manufacturers must be cushioned by assistance from (the) government” and suggests that it be made mandatory for the government to support vaccine producers with advance market commitments (AMCs).
Madhavi explained that AMCs provide guaranteed markets for a vaccine even before trials are conducted, with the government committed to paying a supporting minimum price. “Even if the vaccine turns out to be less efficacious than the existing one the government must honour the AMC by buying the new vaccine at the agreed price.
“This means that AMC funds must be deposited with the World Bank ahead of vaccine delivery by countries that GAVI is supposed to be helping with the introduction of new vaccines,” Madhavi told IPS. “Naturally, GAVI would be looking at large countries like India, Brazil and China to provide the AMCs.”
For a country like India, what is important is to “see how many vaccines are needed to prevent how many deaths and at what cost, rather than throw out tried and tested vaccines in favour of a cocktail (pentavalent) which not only has doubtful advantages but has been shown to cause adverse reactions,” Madhavi said.
According to Madhavi, there is no hard scientific evidence to show that India needs the Hib vaccine .”It is clearly piggybacking on other vaccines and the public made to pay for it.”
The existing diphtheria, tetanus, pertussis (DPT) vaccine costs about 30 cents for all the doses needed to immunise a child, while immunisation with pentavalents will cost more than 10 dollars. “We need to ask ourselves if introducing the new vaccine is really worth all the public money being spent on it,” Madhavi said.
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