The WTO has warned that the reduction in global trade could be bigger than that following the GFC in 2008 – see graph below. For countries to start reducing the volume of imports because export volumes have been decreasing is not seen as the right way forward. With countries dependent on the global supply chain for PPE and pharmaceuticals, it would be wrong to focus on being self-sufficient in these essential products.
As Martin Wolf of the FT pointed out the issue is not with trade but a lack of supply. Export restrictions merely relocate the shortages, by shifting them to countries with the least capacity. The natural response might be to become more self-sufficient in every product but free trade and globalisation does have its advantages: