Are e-cigarettes a safe alternative to smoking review?

An electronic cigarette is a battery-operated apparatus that emits a vaporized solution to inhale. Normally, the solution contains nicotine. The aim is to present the sensation of inhaling tobacco smoke, without the smoke.

Usually, the solution contains nicotine. The purpose is to present the feeling of inhaling tobacco smoke without smoke.
These devices have various names, including electronic cigarettes, electronic cigarette bags, evaporator smoke, electronic cigarettes, and electronic cigarette pens.
For example, some look like USB drives and some look like pencils.
Manufacturers sell e-cigarettes as a resource to quit or reduce smoking, but the US Food and Drug Administration (FDA) classifies it as a tobacco product.
US federal law allows the sale of tobacco products to people under the age of 21. However, the main concern for e-cigarettes is their appeal to young people.
Vaping is a favorite of teenagers.
In the following, the ingredients contained in e-cigarettes are found, their working principles and some studies have shown that they are harmful to health.

In 2019, experts linked vaping to all occurrences of severe lung diseases (now called e-cigarettes or vaping, lung injury or EVALI related to product use). According to data from the Centers for Disease Control and Prevention (CDC), by February 2020, doctors had confirmed 2,807 cases, including 68 deaths. The investigation is continuing.
An electronic cigarette is a device that looks like a cigarette, cigar, pipe, pen, or USB drive. The liquid inside may smell fruity, but the nicotine content is high.
For example, JUUL devices look like USB drives. They seem to have entered the US market in 2015 and have now become the new best-selling electronic cigarette in the US.
Some young people are using JUUL. The refills include cool cucumber, cherry and mint flavors, which look natural and beneficial, but a single JUUL refill contains the nicotine contained in 20 packs of cigarettes.