‘Preposterous’: Anthony Fauci denies cover-up of COVID origins during tense hearing
Long-awaited testimony ends in fireworks as US lawmakers spar over the former infectious-disease official’s pandemic actions.
Long-awaited testimony ends in fireworks as US lawmakers spar over the former infectious-disease official’s pandemic actions.
Governments must act now on vaccine and pathogen-sample sharing, or any agreement will be a promise only on paper.
Contractile forces at the surface of cells of early human embryos bring the cells together. When these forces are absent, the embryo will not develop further. ‘Weak’ cells do not produce these forces and cannot contribute to the embryo. These observations should influence clinical choices during assisted reproductive-technology procedures.