Most young people don't vape or smoke, so the best advice is: if you don't smoke, don't start to vape.
Nicotine vapes can help adult smokers to stop smoking, because they are much less harmful than smoking. But vapes are not harmless. Short-term effects can include coughing, headaches, dizziness and sore throats. The long-term effects are as yet unknown.
Nicotine vapes are age-restricted products, which means it is illegal to sell them to under 18s or for adults to buy them on their behalf. Those who knowingly sell vapes to under 18s are driven by profit and don't care who they sell to.
Disposable vapes and the batteries inside them are harmful for the environment, and many of them end up in landfills.