AWS Load Balancer Target Group failing Health Check

Question

I have fresh-installed nginx on an Amazon EC2 instance.

I created a Load Balancer with a Target Group that points to the EC2 instance. The health status of my target group on port 80 is unhealthy.

1. Does Health Status affect whether the Load Balancer sends the request to the instance?
2. I don't see any kind of request on the defined route for the health check. My security group allows http on the correct port.

I tried to recreate the instance, the load balancer allows all traffic from the security group.