```javascript

let patientId = ;

let result = 'Positive';

let report = `Patient ID: ${patientId}, Result: ${result}`;

```

```javascript

let patientId = ;

let result = 'Positive';

let report = 'Patient ID: ' + patientId + ', Result: ' + result;

```

```javascript

let stock = ;

let price = ;

let info = 'We have ' + stock + ' tea bags in stock, each costs $' + price;

```

```javascript

let userId = ;

let fileName = 'My Documents';

let path = 'Users/' + userId + '/' + fileName;

```

```javascript

let color = 'Green';

let type = 'Waterproof';

let productInfo = 'Our ' + color + ' ' + type + ' paint is now available.';

```