Domestic aviation industry has been severely impacted by the ongoing coronavirus pandemic and may need up to a $3.5 billion booster shot from the government. While almost all domestic airlines are facing the heat of coronavirus lockdown, budget carrier IndiGo is an exception, a report by CAPA said on Friday. The government has allowed recommencement of domestic flight operations in the country but demand is likely to remain subdued until the September quarter and even after that, there is no certainty of revival in the second half, aviation consultancy firm CAPA said in the report. According to another report on domestic aviation industry, it is likely that the airline industry may be headed for a degrowth in FY21, a report by ICRA said on Friday.