SMALLPOX DEMISE LINKED TO SPREAD OF HIV INFECTION

19.05.2010 [14:25]
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Baku, May 19 (AZERTAC). The worldwide eradication of smallpox may, inadvertently, have helped spread HIV infection, scientists believe.

Experts say the vaccine used to wipe out smallpox offered some protection against the Aids virus and, now it is no longer used, HIV has flourished.

The US investigators said trials indicated the smallpox jab interferes with how well HIV multiplies. But they say in the journal BMC Immunology it is too early to recommend smallpox vaccine for fighting HIV. Smallpox immunisation was gradually withdrawn from the 1950s to the 1970s, following the worldwide eradication of the disease, and HIV has been spreading exponentially since then, they say.

Now, only scientists and medical professionals working with smallpox are vaccinated. To test if the events may be linked, the researchers looked at the white blood cells taken from people recently immunised against smallpox and tested how they responded to HIV.

They found significantly lower replication rates of HIV in blood cells from vaccinated individuals, compared with those from unvaccinated controls.

The smallpox vaccine appeared to cut HIV replication five-fold.

SMALLPOX DEMISE LINKED TO SPREAD OF HIV INFECTION

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