Since the end of 2019, the world has been shocked by a new type of virus that has hit residents of Wuhan, China. The virus is named Corona Virus Disease or better known as COVID-19. COVID-19 is rapidly spreading to various countries indiscriminately, both developed countries such as South Korea and the European Union, as well as developing countries such as Malaysia and Indonesia. COVID-19 itself is a phenomenon that has an influence on the development of the world of health. However, the spread of COVID-19 also has an impact on aspects other than health, such as social and economic aspects. A similar statement was also made by Baldwin and Di Mauro (2020) in a curation of a recent article entitled "Economics in the Time of COVID-19" from VoxEU, which stated that COVID-19 is not only a health shock, but also a health shock. is also a shock to the economy (economic shock). At least the economic shocks that occurred due to COVID-19 affected the supply side and the demand side.

Question: Explain the shift in Aggregate Supply (US) which is due to changes in economic variables due to covid-19!