One possible cause of their vulnerability is that the virus has evolved around its problem, and found a way to use a slightly different chemokine receptor as a way into its target macrophages.
Tony Macklin, spokesman for Ask Jeeves, said the results reflected its own research which showed that people use different search engines because the way the sites gather information means they can provide different results for the same query.
BBC: Many people stick with one search engine such as Google
Will the changes in use habits from the desktop and laptop, to the mobile phone, mean that they use search in a fundamentally different way?
"Two people who have two different credit cards with the same APR, and who use their credit card in the same way, could be paying very different levels of interest, " she added.
They studied the way businesses use the site and tested content on people of different ages, and people with different disabilities and first languages.
Check out the video blow, where you can watch the MK2 use a variety of tools in a very precise way to accomplish several different tasks.
FORBES: HDT's MK2 Robot Arm Is A Switch Hitter On The Battlefield
If the respective major tours were to go their own way it could lead to a situation where players could use different putters in events on either side of the Atlantic.
CNN: Golf's major tours split over proposed belly putter ban
That emphasis is no doubt partly because the cheapest way of meeting climate change obligations is to use less rather than different energy.
Others have put forward different ideas for how pigeons find their way, suggesting that the birds use smell, visual clues or the Earth's magnetic field, or even a combination of all of these.
Another way to determine attitudes is natural language processing methods, where software algorithms use different sets of rules to decipher statements and try to glean their intended meaning.
Along the way, the moulding and sculpting of ice into different shapes became more sophisticated, incorporating the use of salt and tools.
Everyone is different, and it is an easy way to give a little something to everyone that they can use where they want.
They seem to have figured out a way to produce an unlimited supply of clones efficiently-- which means they either use a completely different method to create those clones, or they have an unlimited supply of human egg cells.
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