Coronavirus can go up to 8 metres from exhalation, linger in air for hours: MIT scientist

News Network
April 2, 2020

The current physical distancing guidelines provided by the World Health Organisation (WHO) and by the US Centers for Disease Control and Prevention (CDC) may not be adequate to curb the coronavirus spread, according to a research which says the gas cloud from a cough or sneeze may help virus particles travel up to 8 metres. The research, published in the Journal of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.

Study author, MIT associate professor Lydia Bourouiba, warned that droplets of all sizes can travel 23 to 27 feet, or 7-8 metres, carrying the pathogen.

According to Bourouiba, the current guidelines are based on "arbitrary" assumptions of droplet size, "overly simplified", and "may limit the effectiveness of the proposed interventions" against the deadly pandemic.

 She explained that the old guidelines assume droplets to be one of two categories, small or large, taking short-range semi-ballistic trajectories when a person exhales, coughs, or sneezes.

However based on more recent discoveries, the MIT scientist said, sneezes and coughs are made of a puff cloud that carries ambient air, transporting within it clusters of droplets of a wide range of sizes.

Bourouiba warned that this puff cloud, with ambient air entrapped in it, can offer the droplets moisture and warmth that can prevent it from evaporation in the outer environment.

"The locally moist and warm atmosphere within the turbulent gas cloud allows the contained droplets to evade evaporation for much longer than occurs with isolated droplets," she said.

"Under these conditions, the lifetime of a droplet could be considerably extended by a factor of up to 1000, from a fraction of a second to minutes," the researcher explained in the study.

The MIT scientist, who has researched the dynamics of coughs and sneezes for years, added that these droplets settle along the trajectory of a cough or sneeze contaminating surfaces, with their residues staying suspended in the air for hours.

"Even when maximum containment policies were enforced, the rapid international spread of COVID-19 suggests that using arbitrary droplet size cutoffs may not accurately reflect what actually occurs with respiratory emissions, possibly contributing to the ineffectiveness of some procedures used to limit the spread of respiratory disease," Bourouiba wrote in the study

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News Network
December 15,2025

Mangaluru, Dec 15: Air India Express has announced that it will resume direct flight services between Mangaluru and Muscat from March 2026, restoring an important international air link for passengers from the coastal region.

Airport authorities said the service will operate twice a week—on Sundays and Tuesdays—from March 1. The initial flights are scheduled on March 3, 8 and 10, followed by March 15 and 17, with the same operating pattern to continue thereafter. The flight duration is approximately three hours and 25 minutes.

The Mangaluru–Muscat route was earlier operated under the 2025 summer schedule, with services beginning on July 14. At that time, Air India Express had operated four flights a week before suspending the service.

Officials said the summer schedule will come into effect from March 29, after which changes in flight timings and departure schedules from Mangaluru are expected. Passengers have been advised to check the latest schedules while planning their travel.

The resumption of direct flights to Muscat is expected to significantly benefit expatriates, business travellers and others, further strengthening Mangaluru’s air connectivity with the Gulf region.

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News Network
December 19,2025

Mangaluru: Public transport in Mangaluru is set for a state-led transformation as the government moves to deploy 100 new electric govt buses to replace unreliable private services. The initiative aims to provide a dependable alternative to private operators who have been frequently "cutting trips," leaving thousands of commuters stranded.

The announcement was made by Deputy Commissioner and MCC Administrator Darshan HV during a public phone-in session. The move specifically targets routes where private bus service has become erratic, ensuring that citizens no longer have to rely on a fluctuating private sector for their daily commute.

Restoring the Govt Presence

The transport crisis was brought to the forefront by Ramayya, a resident of Bajal, who highlighted a growing trend of private buses skipping morning and night trips. With the previous KSRTC (govt) services discontinued, residents have been left without a fallback option.

To fix this, the DC confirmed that the PM-eBus Sewa Scheme will bring 100 government-owned electric buses to the city:

•    Phased Deployment: The first 50 of the new 100 government buses are scheduled to arrive by March 2026.

•    State Infrastructure: Two new government depots, including one at Mudipu, are being prepared for operations.

•    Recruitment: The state has already begun training a new batch of government bus drivers to ensure the fleet is operational the moment it arrives.

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News Network
December 19,2025

Mangaluru: In a decisive move to tackle the city’s deteriorating sanitation infrastructure, the Mangaluru City Corporation (MCC) has announced a massive ₹1,200 crore action plan to overhaul its underground drainage (UGD) network.

The initiative, spearheaded by Deputy Commissioner and MCC Administrator Darshan HV, aims to bridge "missing links" in the current system that have left residents grappling with overflowing sewage and environmental hazards.

The Breaking Point

The announcement follows a high-intensity phone-in session on Thursday, where the DC was flooded with grievances from frustrated citizens. Residents, including Savithri from Yekkur, described a harrowing reality: raw sewage from apartments leaking into stormwater drains, creating a "permanent stink" and turning residential zones into mosquito breeding grounds.

"We are facing immense difficulties due to the stench and the health risks. Local officials have remained silent until now," one resident reported during the session.

The Strategy: A Six-Year Vision

DC Darshan HV confirmed that the proposed plan is not a temporary patch but a comprehensive six-year roadmap designed to accommodate Mangaluru’s projected population growth. Key highlights of the plan include:

•    Infrastructure Expansion: Laying additional pipelines to connect older neighborhoods to the main grid.

•    STP Crackdown: Stricter enforcement of Sewage Treatment Plant (STP) regulations. While new apartments are required to have functional STPs, many older buildings lack them entirely, and several newer units are reportedly non-functional.

•    Budgetary Push: The plan has already been discussed with the district in-charge minister and the Secretary of the Urban Development Department. It is slated for formal presentation in the upcoming state budget.

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