Scientists are no further forward in developing a vaccine against HIV after more than 20 years of research says Nobel Prize-winning biologist David Baltimore.
The 1918 influenza strain developed two mutations in the hemagglutinin which allowed it to bind tightly to receptors in the human upper respiratory tract.
Ciguatera poisoning is caused by the consumption of tropical reef fish that have assimilated ciguatoxins through the marine food chain from toxic microscopic algae.
Health care workers in emergency departments are often carriers of the methicillin-resistant Staphylococcus aureus (MRSA), potentially putting patients at risk.