Absentee ballot voting is not the same thing as Voting by mail.  

Absentee ballots must be requested by filling out the absentee ballot form and sending it to the Board of Elections. 

In 14 states a voter applying for an absentee ballot must tell why they are unable to vote at the polls. The reason for requesting the absentee ballot must meet one of the states legal requirements

Voting by mail means you can vote from home without giving and reason.

According to NCSL (National Conference of State Legislatures):   

Five states currently conduct all elections entirely by mail: Colorado, Hawaii, Oregon, Washington and Utah. At least 21 other states have laws that allow certain smaller elections, such as school board contests, to be conducted by mail. 

For these elections, all registered voters receive a ballot in the mail. The voter marks the ballot, puts it in a secrecy envelope or sleeve and then into a separate mailing envelope, signs an affidavit on the exterior of the mailing envelope, and returns the package via mail or by dropping it off.

Here is the Absentee Ballot application form.  Please share it with any of your Democratic friends or family.

No matter what the crisis, we should not let our Democratic system of government fail.

Make sure you vote in the Presidential Primary.