The higher concentration of PM₁₀ and PM_2.5 in the lower atmosphere is severely harmful for human health and it also makes visibility diminution along with weather and climate modifications. The main objective is to find out the spatiotemporal variation and dispersal of PM₁₀ and PM_2.5 along with COVID-19 infection in the dusty city Kolkata. The consecutive two years PM₁₀ and PM_2.5 data of different stations have been obtained from State Pollution Control Board, Govt. of West Bengal. Forward trajectory analysis has been done through HYSPLIT (Hybrid Single Particle Lagrangian Integrated Trajectory) model to find the path and direction of air particles. The result showed that the various meteorological or environmental factors (such as temperature, relative humidity, wind, wind speed, pressure and gusty wind) and geographical location regulate the spatiotemporal variation of PM₁₀ and PM_2.5. These factors like high temperature with relative humidity and strong wind influence to disperse the particulate matters from north to south direction from city to outside during summer in Kolkata metropolitan city. During summer (both pre and lockdown years), the height of particles is extended up to 1000 m owing to active atmospheric ventilation whereas in winter it is confined within 100 m. The HYSPLIT model clearly specified that the particles dispersed from south, south-west to north and north east direction due to strong wind. The constant magnification of PM₁₀ and PM_2.5 in the lower atmosphere leads to greater frequency of COVID-19 infections and deaths. In Kolkata, the one of the crucial reasons of high infection and deaths (COVID-19) is co-morbidity of people.

低层大气中较高浓度的 PM ₁₀和 PM _2.5对人类健康严重有害，并且随着天气和气候变化，它还会降低能见度。主要目标是找出 PM ₁₀和 PM _2.5以及 COVID-19 感染在尘土飞扬的城市加尔各答的时空变化和扩散。连续两年 PM ₁₀和 PM _2.5不同站的数据已从国家污染控制委员会获得，政府。西孟加拉邦。通过HYSPLIT（Hybrid Single Particle Lagrangian Integrated Trajectory）模型进行前向轨迹分析，寻找空气粒子的路径和方向。结果表明，各种气象或环境因素（如温度、相对湿度、风、风速、气压和阵风）和地理位置调节了 PM ₁₀和 PM _2.5的时空变化. 夏季高温、相对湿度和强风等因素会影响加尔各答大城市的颗粒物从北向南从城市向外扩散。在夏季（前年和封锁​​年），由于积极的大气通风，颗粒的高度增加到 1000 m，而在冬季，它被限制在 100 m 以内。HYSPLIT 模型明确指出，由于强风，粒子从南、西南、北和东北方向分散。低层大气中 PM ₁₀和 PM _2.5的不断放大导致 COVID-19 感染和死亡的频率更高。在加尔各答，高感染率和高死亡率 (COVID-19) 的关键原因之一是人们的合并症。