Implemented quarantine due to the ongoing novel coronavirus (agent of COVID-19) has an immense impact on human mobility and economic activities as well as on air quality. Since then, and due to the drastic reduction in pollution levels in cities across the world, a large discussion has been magnetized regarding if the lockdown is an adequate alternative counter-measure for enhancing air quality. This paper aimed at studying the Air Quality Index (AQI), PM2.5, and tropospheric NO2 levels in three lockdown phases (before, during, and after) among 21 cities around the world. Simple before/after comparison approach was carried out to capture the declining trend in air pollution levels caused by the lockdown restrictions. The results showed that the frequency distribution for NO2 is more variable than that for PM2.5, and the distribution is flatter from 2020 to the baseline 2018-2019 period. Besides, AQI, in most of the cities, has varied from high to mild pollution during the lockdown and was moderate before. Although during the lockdown, a reduction of 3 to 58% of daily NO2 concentrations was observed across the cities, an increase was detected in three cities including Abidjan (1%), Conakry (3%), and Chengdu (10%). Despite this mixed trend, the NO2 time series clearly showed the effect of the unlocking phase where the NO2 levels increased in almost all cities. Similarly, PM2.5 concentrations have increased in the post-lockdown period, with 50% of the cities reporting significant positive differences between the lock and the unlock phase. Then, the levels of PM2.5 were higher at the pre-lockdown phase than at any other time exhibiting a “U” shape. In addition, during Ramadan, it was noted that altered patterns of daily activities in some Islamic cities have a significant negative impact on air quality.

Lymphangioma circumscriptum is a congenital lymphatic hamartoma and rarely occurs in the male genital organs. Here we report a case of acquired lymphangioma circumscriptum of scrotum following vasectomy, which has not been reported till date. High clinical suspicion index is the clue to the clinician for diagnosis; histopathological confirmation and adequate surgical excision with deep lymphatic cisterns give the best result.

Rhinosporidiosis is a non-contagious chronic granulomatous disease that is prevalent in southern India and Sri Lanka. It has been known for centuries, but the details of the disease and the precise manner of its transmission have, until recently, remained unknown. Our institution sees many cases of this disease and we investigate the management protocol and its recent advances and include a review of the published literature. A total of 152 patients who were treated at Bankura Sammilani Medical College were studied between 2005 and 2011. The most common age group affected were those aged between 11 and 20 years of age and the male-to-female ratio was 1.9:1. Three patients suffered recurrent disease - one experienced it on the same site and the others on distant sites. Eleven patients with inadequate excision in which the margins were not free from disease were treated with dapsone therapy without any reported recurrence. It is a common disease in southwestern West Bengal. Surgical excision with electrocoagulation of the base is the main treatment, and dapsone therapy is recommended in order to prevent recurrences in multiple sites of affection and inadequate surgically excised cases. Although the disease occurs sporadically in most parts of the world, we see many patients in our area.

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