sentences: looking ahead, the global economy would have to move forward in a sea of uncertainties  likely  to  arise  from  1  a  significant  lack  of  effective  mass  vaccination;  2  rising  yields  on  longer-term bonds of major economies, which could cause financial conditions to tighten; 3  financial  fragilities  exacerbating  further  as  the  pandemic  aggravates  existing  inequality,  productivity slack, and debt burdens; 4 lingering global economic and trade uncertainties over  such  issues  as  us-china  relations,  as  well  as  unabated  climate  change  risks