"Beware of additives in the e-cigarettes," said senior researcher Kambez Benam, an associate professor in the division of pulmonary, allergy and critical care medicine at the University of Pittsburgh's School of Medicine

These countries include Andorra, Angola, Anguilla, Armenia, Azerbaijan, Bolivia, Bulgaria, Bhutan, Bahrain, Botswana, Bangladesh, Belarus, Bosnia and Herzegovina, Burundi, Bahamas, Brunei, Burkina Faso, Cuba, Comoros, Cameroon, Chad, China, Curacao, Cambodia, Cape Verde, Dominican Republic, Djibouti, Egypt, Equatorial Eswatini, Eritrea, Ethiopia, El Salvador, Jordan, Japan, Finland, France, Fiji, Guatemala, Guinea, Grenada, Guinea-Bissau, Greenland, Haiti, Honduras, Hong Kong, Hungary, Indonesia, Iran, Iraq, Ivory Coast, Kenya, Kuwait, Kyrgyzstan, Kiribati, Kazakhstan,Latvia, Liechtenstein, Liberia, Libya, Laos, Lesotho, Malaysia, Mali, Mauritius, Moldova, Monaco, Myanmar, Mozambique, Madagascar, Marshall Islands, Maldives, Montenegro, Macau, Iceland, Micronesia, Mongolia, Mauritania, Nicaragua, Namibia, Nepal, Niger, Nigeria, Oman, Papua New Guinea, Palau, Pakistan, Qatar, Russia, Romania, San Marino, Sao Tome and Principe, South Sudan, Serbia, Saudi Arabia, Sierra Leone, Senegal, Singapore, Slovakia, Somalia, Sudan, Suriname, Syria, Seychelles, Samoa, Uganda, Uzbekistan, Turkmenistan, Tajikistan, Tanzania, Taiwan, The Central African Republic, The Philippines, The Republic of Benin, the Republic of the Congo, Solomon Islands, The United Arab Emirates, Togo, Tunisia, Tuvalu, Tonga, Venezuela, Vietnam, Vatican City, and Yemen

Building up slowly prevents nausea or dizziness some get when pushed too far, too fast
People that regularly smoke cigarettes may be 15 to 30 times more likely, compared to those who do not smoke, to receive a lung cancer diagnosis