From BBC Article:
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.
Kill no cure
Lead researcher Dr Raymond Weinstein, from Virginia’s George Mason University, said: “There have been several proposed explanations for the rapid spread of HIV in Africa, including wars, the reuse of unsterilised needles and the contamination of early batches of polio vaccine.
“However, all of these have been either disproved or do not sufficiently explain the behaviour of the HIV pandemic.”
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