Long-dormant viruses brought back to life; the resurgence of deadly and disfiguring smallpox; a dengue or zika
These could be disaster movie storylines, but they are also serious and increasingly plausible scenarios of epidemics unleashed by global warming, scientists say.
"When you put a seed into soil that is then frozen for thousands of years, nothing happens," said Jean-Michel Claverie, an emeritus professor of genomics at the School of Medicine of Aix-Marseille University in France. The number of bacteria and viruses lurking in the permafrost is incalculable, but the more important question is how dangerous they are."Anthrax shows that bacteria can be resting in permafrost for hundreds of years and be revived," said Evengard.
But they"have probably been inactivated", Romanovsky concluded in a study published earlier this year. "Mosquitoes moving their range north are now able to overwinter in some temperate regions," said Jeanne Fair, deputy group leader for biosecurity and public health at the Los Alamos National Laboratory in New Mexico.Native to southeast Asia, the tiger mosquito -- which carries dengue and chikungunya -- arrived in southern Europe in the first decade of this century and has been moving rapidly north ever since, to Paris and beyond.
As for malaria -- a disease that once blighted southern Europe and the southern United States and for which an effective treatment exists -- the risk of exposure depends in large part on social-economic conditions. continues unabated, but strong economic growth and social development could reduce that number to less than two billion, according to a study cited by the IPCC.
پاکستان تازہ ترین خبریں, پاکستان عنوانات
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