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Calcified foci in the lung field usually denotes a healed site of infection which may have been in the past and remained asymptomatic then, most commonly tubercular or fungal infection
. They don't necessarily represent an active disease. Kindly note if you have any of the following: cough
of any type for more than 2 weeks, bloody sputum, weight loss
, evening rise of temperature, night sweats
, joint pain etc. If they are not present then you need not be worried.
Regarding VISA you may have to take a clearance certificate from a registered govt hospital who may order investigations like sputum for acid fast bacilli, CT scan
thorax, ESR, ANA, etc.