Three studies document in-flight transmission of coronavirus

While in-flight transmission of novel coronavirus among passengers is considered to be low, three studies have found instances where coronavirus transmission had probably taken place in-flight. The spread has probably become possible as mask wearing was not compulsory early in the pandemic. But thermal imaging, which has been in place since the beginning, has been found wanting.

Experimental study finds how coronavirus can spread while speaking

Based on experiments and simulations, researchers have found that air emitted during plosive speech sounds — where a consonant (P, B, T, D, K and G) is produced by stopping the airflow using the lips, tongue tip or body followed by a sudden release of air — lead to significantly enhanced directed transport of the virus. When the speech contains a train of such puffs a continuous, turbulent, jet-like flow is formed and is capable of transporting air and droplets to over two metres in just 30 seconds.

CDC says revised guidance on coronavirus spread ‘posted in error’, removes it

On September 21, CDC removed the revised coronavirus spread guidance that acknowledged airborne transmission through aerosols, saying it was “posted in error”. The revised guidance posted three days ago stated that particles carrying the virus can remain suspended in air and spread to distances beyond six feet and is the “main way” the virus spreads.