A global study found that COVID-19 deaths increased by an average of 449 more over the weekend compared to weekdays, with the USA, Brazil, and UK experiencing significantly higher increases. The study suggests bureaucratic delays, hospital staffing levels, and organizational factors contribute to the phenomenon.
Researchers studied two strains of Mycobacterium tuberculosis with different lung attack mechanisms, finding that high-transmission strains trigger granulomas that may aid bacterial escape into the airways. In contrast, low-transmission strains cause inflammation that traps bacteria, reducing transmissibility.
A study found that people are more comfortable with AI companions that are voice-based and less likely to recommend them if they appear too human-like. The researchers suggest that the 'uncanny valley' effect may contribute to this preference.