The South African variant of the CCP virus is more resistant to antibodies than the old variant and may reduce the effectiveness of vaccines, British medical experts have warned. The UK has now identified 105 cases of this variant, 11 of which do not appear to have any links to international travel, Health Secretary Matt Hancock said on Monday. Health authorities are conducting door-to-door “surge testing” for the variant in eight local areas in England in an attempt to contain its transmission in the communities. Calum Semple, professor of child health and outbreak medicine at the University of Liverpool, said the South African variant’s apparent resistance to antibodies is causing concerns. “What’s worrying the scientists is that, in the test tubes, it’s showing less susceptibility to two things—less susceptibility to the plasma of people that have had natural infection, and less susceptibility to the plasma from people that have had …