Health officials are scrambling to control
a deadly yellow fever outbreak in southern
and central Africa before the mosquitoborne
illness spreads to Europe, Asia, and
the Americas. Carried primarily by Aedes
aegypti, the same mosquito that spreads
Zika and dengue, yellow fever has already
killed more than 400 people in Angola
and the Democratic Republic of Congo,
the World Health Organization (WHO)
reports. (Most people with yellow fever
experience only mild muscle pain, jaundice,
and fever, but a small percentage of
patients develop a more severe form—and
about half of these die within several days.)
Efforts to immunize more than 14 million
people in the region have been complicated
by a global vaccine shortage as well
as humid conditions that provide fertile
breeding ground for mosquitoes. Since the
vaccine takes at least six months to produce,
those at risk will receive one-fifth of
the standard dose, which offers protection
against the illness for about one year. “This
outbreak response has been complex and
challenging,” WHO’s Tarik Jasarevic tells
CBSNews.com. “For the first time, WHO
and other partners are dealing with an
outbreak of yellow fever in a dense, urban
setting.” Urbanization, greater mobility,
and climate change, he notes, “mean an
increased risk of mosquito-borne diseases
spreading internationally.”
Tweets get quality control
Twitter is now offering powerful antiharassment
tools, once reserved for highprofile
users, to everyone, said Nick Statt in
TheVerge.com. All users will be able to limit
their notifications to people they follow on
the social network, giving themselves more
control over what they see by hiding tweets
from random strangers and other would-be
abusers. Twitter is also making its “quality
filter” available to everyone. The filter weeds
out tweets from potential harassers based on
their previous online behavior. “These features
aren’t exactly new.” But until now, they have
been available only to users with “verified
accounts,” such as celebrities, media personalities,
and other Twitter power users.
tools, once reserved for highprofile
users, to everyone, said Nick Statt in
TheVerge.com. All users will be able to limit
their notifications to people they follow on
the social network, giving themselves more
control over what they see by hiding tweets
from random strangers and other would-be
abusers. Twitter is also making its “quality
filter” available to everyone. The filter weeds
out tweets from potential harassers based on
their previous online behavior. “These features
aren’t exactly new.” But until now, they have
been available only to users with “verified
accounts,” such as celebrities, media personalities,
and other Twitter power users.
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