# EntityAggregate
<a name="API_EntityAggregate"></a>

The number of entities that are affected by one or more events. Returned by the [DescribeEntityAggregates](https://docs.aws.amazon.com/health/latest/APIReference/API_DescribeEntityAggregates.html) operation.

## Contents
<a name="API_EntityAggregate_Contents"></a>

 ** count **   <a name="AWSHealth-Type-EntityAggregate-count"></a>
The number of entities that match the criteria for the specified events.  
Type: Integer  
Required: No

 ** eventArn **   <a name="AWSHealth-Type-EntityAggregate-eventArn"></a>
The unique identifier for the event. The event ARN has the `arn:aws:health:event-region::event/SERVICE/EVENT_TYPE_CODE/EVENT_TYPE_PLUS_ID ` format.  
For example, an event ARN might look like the following:  
 `arn:aws:health:us-east-1::event/EC2/EC2_INSTANCE_RETIREMENT_SCHEDULED/EC2_INSTANCE_RETIREMENT_SCHEDULED_ABC123-DEF456`   
Type: String  
Length Constraints: Maximum length of 1600.  
Pattern: `arn:aws(-[a-z]+(-[a-z]+)?)?:health:[^:]*:[^:]*:event(?:/[\w-]+){3}`   
Required: No

 ** statuses **   <a name="AWSHealth-Type-EntityAggregate-statuses"></a>
The number of affected entities aggregated by the entity status codes.  
Type: String to integer map  
Valid Keys: `IMPAIRED | UNIMPAIRED | UNKNOWN | PENDING | RESOLVED`   
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/health-2016-08-04/EntityAggregate) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/health-2016-08-04/EntityAggregate) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/health-2016-08-04/EntityAggregate)