Scientists have successfully activated molecules located inside cell tissues using two-photon excitation from infrared light lasers, with an efficiency of almost 100%. [ + ]

The influenza vaccine may be less effective in the elderly because their B cells are less capable of producing antibodies that can adapt to protect against new viral strains. [ + ]

The directors of Don Whitley Scientific are sad to announce that the company's founder and chairman, Dr Don Whitley, has died at age 89 after a short illness. [ + ]

A new international research laboratory, which aims to turbocharge scientific collaboration between Australia and France, is set to be established in Adelaide. [ + ]

A robotic rover deployed in the most Mars-like environment on Earth, Chile's Atacama Desert, has recovered subsurface soil samples during a trial mission to find signs of life. [ + ]

A boy and a girl in Brisbane have been confirmed as the second set of semi-identical twins in the world — and the first to be identified by doctors during pregnancy. [ + ]

A new map of the brain's immune system reveals that the phagocytes in the brain — the so-called microglia — all have the same core signature but adapt in different ways depending on their function. [ + ]

The board of medicinal cannabis company AusCann has announced the appointment of Ido Kanyon as Chief Executive Officer, commencing 22 May. [ + ]

Trial data showed that Melbourne biotech company Aravax's therapy has a highly favourable safety profile, even in patients with severe peanut allergies. [ + ]

Thermo Fisher Scientific has signed a multiyear agreement with German immunotherapy company BioNTech, focused on supplying critical raw materials for the manufacturing of precise immunotherapy vaccine candidates. [ + ]

Researchers have revealed how origami-style folded paper, prepared with a printer and a hotplate, has detected malaria with 98% sensitivity in infected participants in Uganda. [ + ]

Direct-acting antivirals have been found to be associated with a reduced risk of liver cancer and death in people with chronic hepatitis C. [ + ]

The new funding will enable the manufacture and testing of a number of Strep A vaccines currently being developed and fast-tracking of clinical trials in Australia. [ + ]

Sufferers of frontotemporal dementia become increasingly fixed on their external environment and lose the ability to mind wander, even during periods of boredom. [ + ]

A new screening technique for non-small-cell lung cancer helps assess whether immune checkpoint inhibitors would be a suitable treatment method for individual patients. [ + ]