Which acts as both a physical and chemical barrier against pathogens? skin lymph blood mucus

What is difference between an epidemic and a pandemic? a) an epidemic is a disease; a pandemic is a treatment.b) an epidemic is restricted to a local region; a pandemic is global.c) an epidemic has low mortality; a pandemic has higher mortality.d) an epidemic is caused by a bacterial infection; a pandemic is caused by a viral infection.

Your friend is trying to quit drinking to become more healthy. what can she do to improve her chances of sucess?

You and your friend have been assigned to complete to complete a project. you both work together equally and get it done on time. what is this example of?