No they can not. It is legal for someone else to pick up your mail as long as you inform the post office that someone will be picking it up. It is only illegal if the person picking up your mail opens it.
A carrier of chickenpox, like a carrier of any infectious disease, is someone who is infected and can transmit the germ but does not yet have symptoms. A chickenpox carrier is someone who's spreading the virus but does not yet have symptoms.
It means someone picking out your clothes.
To pick on someone means to make fun of them or tease them.
No. Not unless the type of foodborne illness they have can be transmitted to others via direct contact or indirect. Someone who is sick due to ingestion of toxins would not be able to transmit that to someone else and would not be a carrier. Someone who has hepatitis could be a carrier.
giving it to someone
It means someone picking out your clothes.
Stop!!
No, it is not recommended to bring flowers to the airport when picking someone up due to security restrictions and limited space in the arrival area.
A carrier is someone who has a gene, but does not express that gene. It's like someone holding a book but is not capable of reading it. The carrier has no symptoms of the disease. The carrier can have a child with cystic fibrosis if the other parent is also a carrier of that gene.
It could be a noun meaning someone or something that carries, or it could be used as an adjective as in - a carrier bag.
Yes
A mail carrier